Add GitHub Actions workflows for automated PR labeling, contributor recognition, and validation

Add GitHub Actions workflows for automated PR labeling, contributor recognition, and validation

Author: dill-lk

.dockerignore

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+# Docker ignore file for Gravity-Lang
+
+# Git
+.git
+.gitignore
+.gitattributes
+
+# Build artifacts
+build/
+*.o
+*.obj
+*.so
+*.dylib
+*.dll
+*.exe
+
+# CMake
+CMakeCache.txt
+CMakeFiles/
+cmake_install.cmake
+Makefile
+
+# IDE
+.vscode/
+.idea/
+*.swp
+*.swo
+*~
+.DS_Store
+
+# Documentation build
+_site/
+.jekyll-cache/
+.sass-cache/
+Gemfile.lock
+
+# Output artifacts
+artifacts/*.csv
+artifacts/*.svg
+artifacts/*.json
+*.csv
+*.svg
+
+# GitHub
+.github/
+
+# Docs (include in image as examples)
+# docs/
+
+# Keep examples lightweight
+# examples/
+
+# Package manager
+node_modules/
+vendor/
+
+# Python
+__pycache__/
+*.pyc
+*.pyo
+*.pyd
+.Python
+venv/
+env/
+
+# Temporary files
+*.tmp
+*.log
+*.bak
+.cache/

.github/ISSUE_TEMPLATE/bug_report.md

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+---
+name: Bug Report
+about: Report a bug or unexpected behavior
+title: '[BUG] '
+labels: bug
+assignees: ''
+---
+
+## Bug Description
+
+A clear and concise description of what the bug is.
+
+## To Reproduce
+
+Steps to reproduce the behavior:
+
+1. Create a `.gravity` file with the following content:
+   ```gravity
+   # Paste your script here
+   ```
+
+2. Run the command:
+   ```bash
+   ./build/gravity run script.gravity
+   ```
+
+3. Observe the error/unexpected behavior
+
+## Expected Behavior
+
+A clear description of what you expected to happen.
+
+## Actual Behavior
+
+What actually happened. Include error messages, warnings, or incorrect output.
+
+```
+# Paste error messages or output here
+```
+
+## Environment
+
+- **OS**: [e.g., Ubuntu 22.04, macOS 14, Windows 11]
+- **Compiler**: [e.g., GCC 11.4, Clang 15, MSVC 2022]
+- **CMake Version**: [e.g., 3.22]
+- **Gravity-Lang Version/Commit**: [e.g., v0.1.0 or commit hash]
+
+## Additional Context
+
+Add any other context about the problem here, such as:
+- Does this work with a different integrator?
+- Does this happen with simpler scripts?
+- Any relevant physics background or expected behavior
+
+## Possible Solution
+
+If you have ideas about what might be causing the issue or how to fix it, please share them here.

.github/ISSUE_TEMPLATE/config.yml

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+blank_issues_enabled: false
+contact_links:
+  - name: GitHub Discussions
+    url: https://github.com/dill-lk/Gravity-Lang/discussions
+    about: Ask questions and discuss ideas with the community

.github/ISSUE_TEMPLATE/feature_request.md

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+---
+name: Feature Request
+about: Suggest a new feature or enhancement
+title: '[FEATURE] '
+labels: enhancement
+assignees: ''
+---
+
+## Feature Description
+
+A clear and concise description of the feature you'd like to see.
+
+## Motivation
+
+Why would this feature be useful? What problem does it solve?
+
+## Proposed Solution
+
+Describe how you envision this feature working. Include:
+
+### DSL Syntax (if applicable)
+
+```gravity
+# Example of how the feature might be used in a .gravity script
+sphere Body1 at [0,0,0][m] mass 1e24[kg] radius 6371[km]
+# Your proposed syntax here
+```
+
+### CLI Usage (if applicable)
+
+```bash
+# Example command-line usage
+./build/gravity run script.gravity --new-flag
+```
+
+## Alternatives Considered
+
+Have you considered any alternative solutions or workarounds? If so, what are they and why is your proposed solution better?
+
+## Additional Context
+
+Add any other context, mockups, references to papers, or examples from other tools that support this feature.
+
+## Implementation Notes
+
+If you have technical insights about how this could be implemented, please share them here. This is optional but helpful.
+
+## Backward Compatibility
+
+Would this feature require breaking changes to existing scripts or APIs? If so, how could we minimize the impact?

.github/ISSUE_TEMPLATE/question.md

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+---
+name: Question
+about: Ask a question about using Gravity-Lang
+title: '[QUESTION] '
+labels: question
+assignees: ''
+---
+
+## Question
+
+What would you like to know about Gravity-Lang?
+
+## Context
+
+Please provide context about what you're trying to accomplish:
+
+- What are you trying to simulate?
+- What have you tried so far?
+- Where are you stuck?
+
+## Code/Script (if applicable)
+
+If relevant, include your `.gravity` script or the command you're running:
+
+```gravity
+# Your script here
+```
+
+```bash
+# Command you're running
+./build/gravity run script.gravity
+```
+
+## Documentation
+
+Have you checked the following resources?
+- [ ] README.md
+- [ ] CONTRIBUTING.md
+- [ ] Example scripts in `examples/`
+- [ ] Existing issues
+
+## Additional Information
+
+Any other details that might help us answer your question.

.github/PULL_REQUEST_TEMPLATE.md

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+## Description
+
+<!-- Provide a clear and concise description of what this PR does -->
+
+## Type of Change
+
+<!-- Mark the relevant option with an 'x' -->
+
+- [ ] Bug fix (non-breaking change that fixes an issue)
+- [ ] New feature (non-breaking change that adds functionality)
+- [ ] Breaking change (fix or feature that would cause existing functionality to not work as expected)
+- [ ] Documentation update
+- [ ] Performance improvement
+- [ ] Code refactoring
+- [ ] Test addition/improvement
+- [ ] Build/CI improvement
+
+## Related Issues
+
+<!-- Link to related issues: Fixes #123, Closes #456, Related to #789 -->
+
+## Changes Made
+
+<!-- List the specific changes you made -->
+
+-
+-
+-
+
+## Testing
+
+<!-- Describe the tests you ran and how to reproduce them -->
+
+### Test Environment
+
+- **OS**:
+- **Compiler**:
+- **CMake Version**:
+
+### Test Commands
+
+```bash
+# Build
+cmake -S . -B build
+cmake --build build -j
+
+# Run tests
+cd build
+ctest --output-on-failure
+
+# Manual testing (if applicable)
+./build/gravity run examples/your_test.gravity
+```
+
+### Test Results
+
+<!-- Paste relevant test output or screenshots -->
+
+```
+# Test output here
+```
+
+## Checklist
+
+<!-- Mark completed items with an 'x' -->
+
+- [ ] My code follows the project's coding standards
+- [ ] I have performed a self-review of my code
+- [ ] I have commented my code, particularly in hard-to-understand areas
+- [ ] I have updated the documentation accordingly
+- [ ] My changes generate no new warnings
+- [ ] I have added tests that prove my fix is effective or that my feature works
+- [ ] New and existing unit tests pass locally with my changes
+- [ ] Any dependent changes have been merged and published
+
+## DSL Changes (if applicable)
+
+<!-- If you've changed the .gravity DSL syntax, provide examples -->
+
+### Before
+
+```gravity
+# Old syntax
+```
+
+### After
+
+```gravity
+# New syntax
+```
+
+## Breaking Changes
+
+<!-- If this PR introduces breaking changes, describe them and provide migration instructions -->
+
+## Additional Notes
+
+<!-- Any additional information that reviewers should know -->
+
+## Screenshots (if applicable)
+
+<!-- Add screenshots, plots, or animations showing the changes in action -->

.github/labeler.yml

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+# Configuration for path-based labeling
+# See: https://github.com/actions/labeler
+
+# Documentation changes
+documentation:
+  - changed-files:
+    - any-glob-to-any-file: ['docs/**/*', '*.md', 'README.md', 'CONTRIBUTING.md']
+
+# C++ source code
+cpp:
+  - changed-files:
+    - any-glob-to-any-file: ['cpp/**/*.cpp', 'cpp/**/*.h', 'cpp/**/*.hpp']
+
+# Examples
+examples:
+  - changed-files:
+    - any-glob-to-any-file: ['examples/**/*.gravity']
+
+# Build system
+build:
+  - changed-files:
+    - any-glob-to-any-file: ['CMakeLists.txt', 'cmake/**/*']
+
+# CI/CD
+ci/cd:
+  - changed-files:
+    - any-glob-to-any-file: ['.github/workflows/**/*', '.github/actions/**/*']
+
+# Docker
+docker:
+  - changed-files:
+    - any-glob-to-any-file: ['Dockerfile', 'docker-compose.yml', '.dockerignore']
+
+# Tests
+tests:
+  - changed-files:
+    - any-glob-to-any-file: ['tests/**/*', 'test/**/*']
+
+# Tools and scripts
+tools:
+  - changed-files:
+    - any-glob-to-any-file: ['tools/**/*', 'scripts/**/*']
+
+# Dependencies
+dependencies:
+  - changed-files:
+    - any-glob-to-any-file: ['**/package.json', '**/requirements.txt', '**/Gemfile', 'Formula/**/*']
+
+# GitHub templates
+github-templates:
+  - changed-files:
+    - any-glob-to-any-file: ['.github/ISSUE_TEMPLATE/**/*', '.github/PULL_REQUEST_TEMPLATE.md']
+
+# Configuration files
+configuration:
+  - changed-files:
+    - any-glob-to-any-file: ['_config.yml', '.gitignore', '.dockerignore', '*.yml', '*.yaml']