Simplifies CI build

.github/workflows/build-simple.yml

@@ -0,0 +1,26 @@
+name: Java CI with Gradle
+
+on:
+  push:
+    branches: [ main ]
+  pull_request:
+    branches: [ main ]
+
+jobs:
+  build-checkout:
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        java: [ '17', '21' ]
+    name: Java ${{ matrix.Java }} sample
+    steps:
+      - uses: actions/checkout@v3
+      - name: Setup java
+        uses: actions/setup-java@v3
+        with:
+          distribution: 'temurin'
+          java-version: ${{ matrix.java }}
+      - name: Grant checkout-example execute permission for gradlew
+        run: chmod +x gradlew
+      - name: Build all examples with Gradle
+        run: ./gradlew build