Create build-android.yml

created a workflow file specifically to build an Android APK

.github/workflows/build-android.yml

@@ -0,0 +1,34 @@
+name: Build Android APK
+
+on:
+  workflow_dispatch: # Allows you to run it manually from the Actions tab
+    paths:
+      - 'composeApp/**'
+      - 'gradle/**'
+      - '*.gradle.kts'
+
+jobs:
+  build-android:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
+      - name: Set up JDK 17
+        uses: actions/setup-java@v4
+        with:
+          java-version: '17'
+          distribution: 'zulu'
+          cache: gradle
+
+      - name: Grant execute permission for gradlew
+        run: chmod +x gradlew
+
+      - name: Build Android Debug APK
+        run: ./gradlew :composeApp:assembleDebug
+
+      - name: Upload APK artifact
+        uses: actions/upload-artifact@v4
+        with:
+          name: app-debug
+          path: composeApp/build/outputs/apk/debug/*.apk