Add basic GitHub CI

Author: jaudriga

.github/workflows/test.yml

@@ -0,0 +1,36 @@
+
+on:
+  push:
+    branches: [ "main" ]
+  pull_request:
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v3
+
+      - name: Set up JDK 11
+        uses: actions/setup-java@v3
+        with:
+          java-version: '11'
+          distribution: 'adopt'
+
+      - name: Cache Ant dependencies
+        uses: actions/cache@v3
+        with:
+          path: ~/.ant
+          key: ${{ runner.os }}-ant-${{ hashFiles('**/build.xml') }}
+          restore-keys: |
+            ${{ runner.os }}-ant-
+
+      - name: Build H2LJ with Ant
+        run: ant jar-h2lj
+
+      - name: Build main JAR with Ant
+        run: ant jar
+
+      - name: Build scanner with Ant
+        run: ant jar-scanner