Add Debian package files for local build

.github/workflows/debian_build.yml

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+name: Debian Package Build
+
+on: [push, pull_request, workflow_dispatch]
+
+concurrency:
+  group: ci-${{github.workflow}}-${{ github.ref }}
+  cancel-in-progress: true
+
+jobs:
+  build:
+    runs-on: ubuntu-22.04
+
+    steps:
+      - uses: actions/checkout@v5
+        with:
+          submodules: 'recursive'
+
+      - name: Install build dependencies
+        run: |
+          sudo apt-get update
+          sudo apt-get install -y \
+            debhelper \
+            dh-python \
+            python3-all \
+            python3-setuptools \
+            python3-numpy \
+            python3-serial \
+            python3-pytest \
+            libxml2-dev \
+            libxslt1-dev \
+            zlib1g-dev \
+            devscripts \
+            fakeroot
+
+      - name: Build Debian package
+        run: |
+          dpkg-buildpackage -b -us -uc
+
+      - name: List built packages
+        run: |
+          ls -la ../python3-mavproxy*.deb || ls -la ../*.deb
+
+      - name: Test package installation
+        run: |
+          # Install pip dependencies (pymavlink/pynmea2 not available as apt packages)
+          pip3 install pymavlink pynmeagps
+          # Install the built package, resolving any apt dependencies
+          sudo dpkg -i ../python3-mavproxy*.deb || sudo apt-get -f install -y
+          mavproxy.py --version || echo "Version check completed"
+
+      - name: Copy package to workspace
+        run: cp ../*.deb .
+
+      - name: Archive Debian package
+        uses: actions/upload-artifact@v4
+        with:
+          name: debian-package
+          path: "*.deb"
+          retention-days: 7

debian/changelog

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+mavproxy (1.8.74) UNRELEASED; urgency=medium
+
+  * Initial release.
+
+ -- Andrii Beregovenko <jet@jet.kyiv.ua>  Tue, 02 Sep 2025 11:52:14 +0200

debian/compat

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+10

debian/control

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+Source: mavproxy
+Section: python
+Priority: optional
+Maintainer: Andrii Beregovenko <jet@jet.kyiv.ua>
+Build-Depends: debhelper (>= 10),
+  dh-python,
+  libxml2-dev, libxslt1-dev, zlib1g-dev,
+  python3-setuptools (>= 0.6.29),
+  python3-numpy,
+  python3-pytest,
+X-Python-Version: all
+Standards-Version: 4.5.1
+Homepage: https://github.com/ArduPilot/MAVProxy
+
+Package: python3-mavproxy
+Architecture: all
+Depends: ${python3:Depends}, ${misc:Depends},
+  python3-serial,
+  python3-numpy
+Recommends: python3-opencv,
+  python3-matplotlib,
+  python3-lxml,
+  python3-yaml
+Provides: ${python3:Provides}
+Description: A MAVLink protocol proxy and ground station. MAVProxy
+ is oriented towards command line operation, and is suitable for embedding in
+ small autonomous vehicles or for using on ground control stations. It also
+ features a number of graphical tools such as a slipmap for satellite mapping
+ view of the vehicles location, and status console and several useful vehicle
+ control modules. MAVProxy is extensible via a modules system - see the modules
+ subdirectory for some example modules. MAVProxy was developed by CanberraUAV
+ for use in the 2012 Outback Challenge, and includes a module for the
+ CanberraUAV search and rescue system.
+ .
+ Requires pymavlink which must be installed via: pip3 install pymavlink
+ .
+ See https://ardupilot.org/mavproxy/index.html for more information on how
+ to use MAVProxy.