Remove Play Store assets and add automated build workflow

Author: brittytino

.github/workflows/build.yml

@@ -0,0 +1,71 @@
+name: Build APK on Push
+
+on:
+  push:
+    branches:
+      - main
+      - develop
+      - master
+  pull_request:
+    branches:
+      - main
+      - develop
+      - master
+
+permissions:
+  contents: write
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+        
+      - name: Set up JDK 17
+        uses: actions/setup-java@v4
+        with:
+          java-version: '17'
+          distribution: 'temurin'
+          cache: gradle
+          
+      - name: Grant execute permission for gradlew
+        run: chmod +x gradlew
+        
+      - name: Build Debug APK
+        run: ./gradlew assembleDebug --stacktrace --no-daemon
+        
+      - name: Build Release APK (if on main branch)
+        if: github.ref == 'refs/heads/main' && github.event_name == 'push'
+        run: ./gradlew assembleRelease --stacktrace --no-daemon
+        env:
+          KEYSTORE_PASSWORD: ${{ secrets.KEYSTORE_PASSWORD }}
+          KEY_PASSWORD: ${{ secrets.KEY_PASSWORD }}
+          
+      - name: Upload Debug APK
+        uses: actions/upload-artifact@v4
+        with:
+          name: patchwork-debug-${{ github.sha }}
+          path: app/build/outputs/apk/debug/app-debug.apk
+          retention-days: 30
+          
+      - name: Upload Release APK (if on main branch)
+        if: github.ref == 'refs/heads/main' && github.event_name == 'push'
+        uses: actions/upload-artifact@v4
+        with:
+          name: patchwork-release-${{ github.sha }}
+          path: app/build/outputs/apk/release/app-release.apk
+          retention-days: 90
+          
+      - name: Comment on PR with APK
+        if: github.event_name == 'pull_request'
+        uses: actions/github-script@v7
+        with:
+          script: |
+            github.rest.issues.createComment({
+              issue_number: context.issue.number,
+              owner: context.repo.owner,
+              repo: context.repo.repo,
+              body: '✅ APK built successfully! Download it from the artifacts section above.'
+            })