ci: add Gitea Actions workflow for building addon

.gitea/workflows/build.yml

@@ -0,0 +1,40 @@
+name: Build Kodi Addon
+
+on:
+  push:
+    branches: [master]
+    tags: ["v*"]
+  pull_request:
+    branches: [master]
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Extract version from addon.xml
+        id: version
+        run: |
+          version=$(grep -oP 'version="\K[^"]+' service.video.hdrnotify/addon.xml | head -1)
+          echo "version=$version" >> "$GITHUB_OUTPUT"
+          echo "Addon version: $version"
+
+      - name: Build ZIP package
+        run: |
+          zip -r "service.video.hdrnotify-${{ steps.version.outputs.version }}.zip" \
+            service.video.hdrnotify/ \
+            -x "service.video.hdrnotify/.*"
+
+      - name: Upload artifact
+        uses: actions/upload-artifact@v4
+        with:
+          name: service.video.hdrnotify-${{ steps.version.outputs.version }}
+          path: service.video.hdrnotify-${{ steps.version.outputs.version }}.zip
+
+      - name: Create Gitea Release
+        if: startsWith(github.ref, 'refs/tags/v')
+        uses: https://gitea.com/actions/release-action@main
+        with:
+          files: service.video.hdrnotify-${{ steps.version.outputs.version }}.zip
+          api_key: '${{ secrets.GITEA_TOKEN }}'