feat: CI 워크플로우 추가 (#39)

* feat: CI 워크플로우 추가

* feat: gradlew 실행 권한 부여

Author: kih1015

.github/workflows/integration-dev.yml

@@ -0,0 +1,41 @@
+name: Spring Boot CI
+
+on:
+  pull_request:
+    branches:
+      - develop
+      - main
+
+permissions:
+  pull-requests: write
+  checks: write
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+
+    steps:
+      # 1. 코드 체크아웃
+      - name: Checkout code
+        uses: actions/checkout@v3
+
+      # 2. JDK 설정
+      - name: Set up JDK 21
+        uses: actions/setup-java@v3
+        with:
+          java-version: '21'
+          distribution: 'temurin'
+
+      # 3. Gradle 실행 권한 부여
+      - name: Grant execute permission for gradlew
+        run: chmod +x gradlew
+
+      # 4. Gradle 설정
+      - name: Setup Gradle
+        uses: gradle/actions/setup-gradle@v3
+        with:
+          cache-read-only: false
+
+      # 5. 빌드 (테스트 제외)
+      - name: Build with Gradle
+        run: ./gradlew build -x test --build-cache