Add GitHub Actions job

Author: ebyhr

.github/workflows/ci.yml

@@ -0,0 +1,17 @@
+name: ci
+
+on: [push, pull_request]
+
+jobs:
+  maven-checks:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-java@v4
+        with:
+          java-version: '23'
+          distribution: 'temurin'
+          cache: 'maven'
+      - name: Maven Checks
+        run: |
+          ./mvnw -B clean install