feat(build): add release automation tasks and CI/CD workflows

- Introduced Gradle tasks for release preparation, version bumping, and git tagging.
- Added CI workflow for continuous integration on pushes and pull requests.
- Implemented release workflow for automated builds and Gitea releases upon tag pushes.
- Created scripts for manual release processes on Windows and Linux/macOS.
- Documented the release process and Gitea Actions setup in the new RELEASE.md and setup-gitea-actions.md files.

.gitea/workflows/ci.yml

@@ -0,0 +1,47 @@
+name: CI
+
+on:
+  push:
+    branches: [ main, develop ]
+  pull_request:
+    branches: [ main ]
+
+jobs:
+  test:
+    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'
+    
+    - name: Cache Gradle packages
+      uses: actions/cache@v3
+      with:
+        path: |
+          ~/.gradle/caches
+          ~/.gradle/wrapper
+        key: ${{ runner.os }}-gradle-${{ hashFiles('**/*.gradle*', '**/gradle-wrapper.properties') }}
+        restore-keys: |
+          ${{ runner.os }}-gradle-
+    
+    - name: Make gradlew executable
+      run: chmod +x ./gradlew
+    
+    - name: Run tests
+      run: ./gradlew test
+    
+    - name: Build project
+      run: ./gradlew build
+    
+    - name: Upload build artifacts
+      uses: actions/upload-artifact@v3
+      with:
+        name: build-artifacts
+        path: build/libs/*.jar
+        retention-days: 7