Add debian package build workflow

.forgejo/workflows/compile.yaml

@@ -39,6 +39,27 @@ jobs:
           overwrite: true
           include-hidden-files: true
           if-no-files-found: error
+  build-deb:
+    runs-on: ubuntu-latest
+    needs: get-source-code
+      - name: Download and cache system dependencies
+        uses: https://complecwaft.com/catmeow/cache-apt-pkgs-action@latest
+        with:
+          packages: debhelper-compat devscripts cmake git python3 libprotobuf-dev protobuf-compiler libsoundtouch-dev libsdl2-dev libsdl2-image-dev qt6-base-dev liburiparser-dev libexpat1-dev libsdbus-c++-dev libsdbus-c++-bin build-essential zstd wget git-buildpackage
+     - name: Download repository code
+       uses: actions/download-artifact@v3
+       with:
+         name: source_archive
+         path: .
+    - name: Extract repository code
+      run: mkdir -p looper && tar -xf source.tar.zst -C looper
+    - name: Build package
+      run: cd looper && gbp build-package
+    - name: Upload package artifacts
+      uses: actions/upload-artifact@v3
+      with:
+        name: debian-packages
+        path: ./looper*.deb
   build-appimage:
     runs-on: ubuntu-latest
     needs: get-source-code