Add Gradle wrapper validation action

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

@@ -0,0 +1,21 @@
+name: "Validate Gradle Wrapper"
+
+on:
+  push:
+    branches:
+      - main
+  pull_request:
+    branches:
+      - '*'
+
+jobs:
+  validation:
+    name: "Validation"
+    runs-on: ubuntu-latest
+    steps:
+      - name: Check out repository
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 1
+      - name: Validate Gradle wrapper
+        uses: gradle/actions/wrapper-validation@v3