Add Forgejo runner configuration for automated builds

.forgejo/README.md

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+# Forgejo Runner Setup for TetriStats
+
+This directory contains the workflow configuration for building and releasing the TetriStats Android APK using Forgejo runners.
+
+## Setting up a Forgejo Runner
+
+To set up a Forgejo runner for this repository:
+
+1. Navigate to your Forgejo instance and log in.
+
+2. Go to your repository settings.
+
+3. Navigate to "Actions" or "CI/CD" section.
+
+4. Click on "Runners" and then "Add Runner."
+
+5. Follow the instructions provided by Forgejo to register a new runner.
+
+### Example runner registration commands:
+
+```bash
+# Download the Forgejo runner
+curl -o forgejo-runner -L https://code.forgejo.org/forgejo/runner/releases/download/v3.3.0/forgejo-runner-3.3.0-linux-amd64
+chmod +x forgejo-runner
+
+# Register the runner with your Forgejo instance
+./forgejo-runner register --no-interactive \
+  --instance <your-forgejo-instance-url> \
+  --token <your-registration-token> \
+  --name <runner-name> \
+  --labels ubuntu-latest,linux \
+  --executor docker \
+  --docker-image node:16 \
+  --docker-volumes /var/run/docker.sock:/var/run/docker.sock
+
+# Start the runner
+./forgejo-runner daemon
+```
+
+Replace `<your-forgejo-instance-url>`, `<your-registration-token>`, and `<runner-name>` with your own values.
+
+## Runner Configuration
+
+The workflow is configured to:
+
+1. Build a signed Android APK
+2. Create a release with the APK attached when:
+   - A new tag is pushed (for official releases)
+   - A commit is pushed to main/master (for development releases)
+
+## Troubleshooting
+
+If you encounter issues with the runner:
+
+1. Check the runner logs for errors
+2. Ensure the runner has sufficient permissions to access your repository
+3. Verify that your Forgejo instance supports actions similar to GitHub Actions
+4. Make sure your runner environment has all necessary dependencies installed (Java 17, Android SDK, etc.)
+
+For more information, refer to the [Forgejo Documentation](https://forgejo.org/docs/). 

.forgejo/workflows/build.yml

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+name: Build and Release Android APK
+
+on:
+  push:
+    branches: [ main, master ]
+    tags:
+      - 'v*'
+  workflow_dispatch:
+
+# Add permissions needed to create releases
+permissions:
+  contents: write
+  packages: read
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+
+      - name: Set up JDK 17
+        uses: actions/setup-java@v3
+        with:
+          distribution: 'temurin'
+          java-version: '17'
+          cache: gradle
+
+      - name: Grant execute permission for gradlew
+        run: chmod +x gradlew
+
+      - name: Get version name from build.gradle
+        id: version
+        run: |
+          VERSION_NAME=$(grep -o 'versionName = "[^"]*' app/build.gradle.kts | cut -d'"' -f2)
+          echo "VERSION_NAME=$VERSION_NAME" >> $GITHUB_ENV
+          echo "APP_VERSION=$VERSION_NAME" >> $GITHUB_OUTPUT
+
+      # Setup keystore directory
+      - name: Setup keystore directory
+        run: mkdir -p app/keystore
+
+      # Generate a keystore for signing
+      - name: Generate keystore
+        run: |
+          keytool -genkey -v -keystore app/keystore/release.keystore -storepass android -alias release -keypass android -keyalg RSA -keysize 2048 -validity 10000 -dname "CN=TetriStats,O=Accidental Productions,L=Unknown,C=US"
+
+      # Set environment variables for signing
+      - name: Set signing environment variables
+        run: |
+          echo "KEYSTORE_PASSWORD=android" >> $GITHUB_ENV
+          echo "KEY_ALIAS=release" >> $GITHUB_ENV
+          echo "KEY_PASSWORD=android" >> $GITHUB_ENV
+
+      # Build a signed release APK
+      - name: Build Release APK
+        run: ./gradlew assembleRelease
+
+      - name: Debug directory structure
+        run: find app/build/outputs -type f -name "*.apk" | sort
+
+      - name: Rename APK for tag release
+        if: startsWith(github.ref, 'refs/tags/')
+        run: |
+          mkdir -p renamed_apk
+          cp app/build/outputs/apk/release/app-universal-release.apk renamed_apk/TetriStats-${{ env.VERSION_NAME }}.apk
+
+      - name: Rename APK for push release
+        if: ${{ !startsWith(github.ref, 'refs/tags/') && github.event_name == 'push' }}
+        run: |
+          mkdir -p renamed_apk
+          cp app/build/outputs/apk/release/app-universal-release.apk renamed_apk/TetriStats-${{ env.VERSION_NAME }}-${{ github.run_number }}.apk
+
+      - name: Upload APK as artifact
+        uses: actions/upload-artifact@v4
+        with:
+          name: TetriStats-APK
+          path: app/build/outputs/apk/release/*.apk
+
+      # For Forgejo, create release with artifact
+      - name: Create Release on Tags
+        if: startsWith(github.ref, 'refs/tags/')
+        uses: ncipollo/release-action@v1
+        with:
+          tag: ${{ github.ref_name }}
+          name: Release ${{ env.VERSION_NAME }}
+          draft: false
+          prerelease: false
+          artifacts: renamed_apk/TetriStats-${{ env.VERSION_NAME }}.apk
+          body: |
+            TetriStats Android App Release v${{ env.VERSION_NAME }}
+            
+            Automatically generated release from Forgejo.
+            
+            Download the APK from the assets below.
+      
+      - name: Create Release on Push
+        if: ${{ !startsWith(github.ref, 'refs/tags/') && github.event_name == 'push' }}
+        uses: ncipollo/release-action@v1
+        with:
+          tag: v${{ env.VERSION_NAME }}-${{ github.run_number }}
+          name: Release v${{ env.VERSION_NAME }}-${{ github.run_number }}
+          draft: false
+          prerelease: false
+          artifacts: renamed_apk/TetriStats-${{ env.VERSION_NAME }}-${{ github.run_number }}.apk
+          body: |
+            TetriStats Android App Release v${{ env.VERSION_NAME }}-${{ github.run_number }}
+            
+            Automatically generated release from Forgejo.
+            
+            Download the APK from the assets below.