Add Github Actions build job with CodeQL

Author: yuzawa-san

.github/workflows/tests.yml

@@ -0,0 +1,35 @@
+name: Build
+
+on:
+  merge_group:
+  pull_request:
+  push:
+    branches:
+      - master
+
+jobs:
+  test:
+    name: Tests
+    runs-on: ubuntu-latest
+    permissions:
+      actions: read
+      contents: write
+      security-events: write
+    steps:
+    - uses: actions/checkout@v4
+    - uses: actions/setup-java@v4
+      with:
+        distribution: 'temurin'
+        java-version: '21'
+        cache: 'maven'
+    - name: Initialize CodeQL
+      uses: github/codeql-action/init@v3
+      with:
+        languages: java
+    - name: Build with Maven
+      timeout-minutes: 15
+      run: mvn -B clean package --file pom.xml
+    - name: Perform CodeQL Analysis
+      uses: github/codeql-action/analyze@v3
+      with:
+        category: "/language:java"