ci: add GitHub release workflow

.github/workflows/release.yml

@@ -0,0 +1,67 @@
+name: Release Android
+
+on:
+  push:
+    tags:
+      - "v*"
+
+permissions:
+  contents: write
+
+concurrency:
+  group: release-${{ github.ref }}
+  cancel-in-progress: false
+
+jobs:
+  release:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Check out repository
+        uses: actions/checkout@v4
+
+      - name: Set up Java 17
+        uses: actions/setup-java@v4
+        with:
+          distribution: temurin
+          java-version: "17"
+          cache: gradle
+
+      - name: Set up Android SDK
+        uses: android-actions/setup-android@v3
+
+      - name: Accept Android SDK licenses
+        run: yes | sdkmanager --licenses >/dev/null
+
+      - name: Install Android SDK packages
+        run: sdkmanager "platform-tools" "platforms;android-35" "build-tools;35.0.0"
+
+      - name: Ensure scripts are executable
+        run: chmod +x gradlew scripts/*.sh
+
+      - name: Build debug APK
+        run: ./scripts/build-debug.sh assembleDebug lint
+
+      - name: Build release bundle
+        run: ./scripts/build-release.sh bundleRelease lintRelease
+
+      - name: Prepare release assets
+        run: |
+          mkdir -p dist
+          cp app/build/outputs/apk/debug/app-debug.apk "dist/relaytv-${GITHUB_REF_NAME}-debug.apk"
+          cp app/build/outputs/bundle/release/app-release.aab "dist/relaytv-${GITHUB_REF_NAME}.aab"
+
+      - name: Upload workflow artifacts
+        uses: actions/upload-artifact@v4
+        with:
+          name: relaytv-${{ github.ref_name }}
+          path: dist/*
+          if-no-files-found: error
+
+      - name: Publish GitHub release
+        uses: softprops/action-gh-release@v2
+        with:
+          generate_release_notes: true
+          files: |
+            dist/relaytv-${{ github.ref_name }}-debug.apk
+            dist/relaytv-${{ github.ref_name }}.aab

README.md

@@ -55,6 +55,13 @@ Release bundle and release lint:
 ./scripts/build-release.sh
 ```
 
+GitHub release assets are generated automatically when you push a tag like:
+
+```bash
+git tag v1.2.0
+git push origin v1.2.0
+```
+
 Connected tests on a physical device or emulator:
 
 ```bash