Add Gradle workflow

.github/workflows/update-gradle-wrapper.yml

@@ -0,0 +1,23 @@
+name: Update Gradle Wrapper
+
+on:
+  workflow_dispatch:
+  schedule:
+    - cron: "0 0 * * *"
+
+jobs:
+  update-gradle-wrapper:
+
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Install JDK 21
+        uses: actions/setup-java@v4
+        with:
+          distribution: 'temurin'
+          java-version: 21
+      - uses: actions/checkout@v4
+      - name: Update Gradle Wrapper
+        uses: gradle-update/update-gradle-wrapper-action@v2
+        with:
+          merge-method: SQUASH