Create publish action

.github/workflows/publish.yml

@@ -0,0 +1,19 @@
+name: Publish
+
+on: workflow_dispatch
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/checkout@v4
+    - name: Set up JDK 8
+      uses: actions/setup-java@v4
+      with:
+        java-version: '8'
+        distribution: 'temurin'
+    - name: Build with Gradle
+      run: ./gradlew build
+    - name: Publish to GitHub Packages
+      run: ./gradlew publish