Add workflow to publish action to GitHub repo

.github/workflows/publish-action-artifact.yml

@@ -0,0 +1,35 @@
+name: Publish action artifact to GitHub project's Maven repository
+
+on:
+  workflow_dispatch:
+  push:
+    branches:
+      - 'main'
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+
+jobs:
+  build-and-push-action:
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      packages: write
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
+      - name: Set up JDK 21
+        uses: actions/setup-java@v4
+        with:
+          java-version: 21
+          distribution: temurin
+          cache: maven
+
+      - name: Build and publish action to Maven repository
+        shell: bash
+        run: |
+          ./mvnw -B clean deploy -Dquarkus.package.type=uber-jar -Dquarkus.package.add-runner-suffix=false
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}