ci: add Gitea Actions pipeline for test + Android APK + Linux build

.github/workflows/ci.yml

@@ -0,0 +1,70 @@
+name: Build & Test
+
+on:
+  push:
+    branches: [main]
+  pull_request:
+    branches: [main]
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - name: Setup Flutter
+        uses: subosito/flutter-action@v2
+        with:
+          flutter-version: '3.35.7'
+      - name: Get dependencies
+        run: flutter pub get
+      - name: Analyze
+        run: flutter analyze
+      - name: Run tests
+        run: flutter test
+
+  build-android:
+    needs: test
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - name: Setup Flutter
+        uses: subosito/flutter-action@v2
+        with:
+          flutter-version: '3.35.7'
+      - name: Setup Java
+        uses: actions/setup-java@v4
+        with:
+          distribution: 'temurin'
+          java-version: '17'
+      - name: Get dependencies
+        run: flutter pub get
+      - name: Build APK
+        run: flutter build apk --release --split-per-abi --no-tree-shake-icons
+      - name: Upload APK
+        uses: actions/upload-artifact@v4
+        with:
+          name: habo-apks
+          path: build/app/outputs/flutter-apk/
+
+  build-linux:
+    needs: test
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - name: Setup Flutter
+        uses: subosito/flutter-action@v2
+        with:
+          flutter-version: '3.35.7'
+      - name: Install Linux deps
+        run: |
+          sudo apt-get update
+          sudo apt-get install -y ninja-build clang cmake pkg-config libgtk-3-dev libblkid-dev liblzma-dev libasound2-dev
+      - name: Get dependencies
+        run: flutter pub get
+      - name: Build
+        run: flutter build linux --release
+      - name: Upload artifact
+        uses: actions/upload-artifact@v4
+        with:
+          name: habo-linux
+          path: build/linux/x64/release/bundle/