Migrate CI to GHA

Author: kokosing

.github/workflows/ci.yaml

@@ -0,0 +1,21 @@
+name: Java CI
+
+on:
+  push:
+    branches:
+      - master
+  pull_request:
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v3
+      - name: Set up JDK 17
+        uses: actions/setup-java@v3
+        with:
+          java-version: '17'
+          distribution: 'zulu'
+      - name: Build with Maven
+        run: mvn --batch-mode package