OCR Tesseract integration

[rokokol]

Title: Add Tesseract OCR integration

Description:
This PR introduces integration with Tesseract OCR. Users can now copy text from a selected area to the clipboard using SelectionTextTool. The tool automatically detects and uses all available language packs. Just use the button with tesseract icon

Changes include:

• Implementation of OCR logic in selectiontexttool.cpp.
• Automatic tessdata path detection across Windows, macOS, and Linux.
• Automatic gathering of all installed languages.
• Clipboard support for both standard and selection buffers, including Wayland compatibility.

This feature enables seamless text recognition from screenshots or selected regions.

Deployment
I use Linux Mint Cinnamon 22.2. You should to install the tesseract and, for example, the English package:

sudo apt install tesseract-ocr tesseract-ocr-eng

[borgmanJeremy]

Thank! I will review more closely at my PC. But at a high level I think we should make this an optional integration so tesseract is not a hard dependency. @mmahmoudian what are your thoughts?

[mmahmoudian]

@borgmanJeremy I remember this being discussed before. OCR is out of the scope of a screenshot tool and therefore it is better if we have this as a plugin. I think it worth the effort to push the plugin system forward.

Update: I collected these:
The #702 is the feature request.
This is already implemented 3 times before this PR:

• Add OCR acction with tessercat #3074
• Add OCR recognizing support and fix copyAndCloseAfterUpload feature #2843
• implemented ocr tool using tesseract #1239