add: クロスプラットフォームのためのGitHub Actions workflowを追加

Author: noah-devtech

.github/workflows/build.yml

@@ -0,0 +1,38 @@
+name: Cross-Platform Build Check
+
+on:
+  push:
+    branches: [ main ]
+  pull_request:
+    branches: [ main ]
+
+jobs:
+  build:
+    strategy:
+      matrix:
+        os: [ ubuntu-latest, windows-latest, macos-latest ]
+
+    runs-on: ${{ matrix.os }}
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+
+      - name: Set up JDK 17
+        uses: actions/setup-java@v4
+        with:
+          java-version: '17'
+          distribution: 'temurin'
+
+      - name: Validate Gradle Wrapper
+        uses: gradle/actions/wrapper-validation@v3
+
+      - name: Setup Gradle
+        uses: gradle/actions/setup-gradle@v3
+
+      - name: Make gradlew executable
+        if: matrix.os != 'windows-latest'
+        run: chmod +x gradlew
+
+      - name: Build with Gradle
+        run: ./gradlew build