Add build and release workflow

Author: YangMu0987

.github/workflows/build_and_release.yml

@@ -0,0 +1,60 @@
+name: Build and Release Mod
+
+# 触发条件
+on:
+  push:
+    branches: [ "main", "master" ] # 推送到主分支时触发日常构建
+    tags: [ "v*" ]                 # 推送 v 开头的 tag 时触发自动发布 (例如 v1.0.0)
+  pull_request:
+    branches: [ "main", "master" ] # 收到 PR 时也会触发编译检查
+
+# 权限设置：允许机器人自动创建 Release
+permissions:
+  contents: write
+
+jobs:
+  build:
+    name: Build and Deploy
+    runs-on: ubuntu-latest
+
+    steps:
+      # 1. 拉取代码
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
+      # 2. 设置 JDK 环境
+      # ⚠️ 注意：Minecraft 1.20.5 及以上要求 Java 21，1.18~1.20.4 是 Java 17
+      - name: Set up JDK 21
+        uses: actions/setup-java@v4
+        with:
+          java-version: '21' 
+          distribution: 'temurin'
+
+      # 3. 设置 Gradle 缓存 (大幅加快后续编译速度)
+      - name: Setup Gradle
+        uses: gradle/actions/setup-gradle@v3
+
+      # 4. 赋予 gradlew 执行权限 (防止 Windows 提交的代码在 Linux 上没有运行权限)
+      - name: Make gradlew executable
+        run: chmod +x ./gradlew
+
+      # 5. 执行编译
+      - name: Build with Gradle
+        run: ./gradlew build
+
+      # 6. 上传 Artifact (日常构建也能下载打包好的 jar 测试)
+      - name: Upload Build Artifacts
+        uses: actions/upload-artifact@v4
+        with:
+          name: mod-artifacts
+          path: build/libs/*.jar # 收集 build/libs 目录下的所有 jar 包
+
+      # 7. 自动创建 GitHub Release (仅在打 tag 时执行)
+      - name: Create GitHub Release
+        uses: softprops/action-gh-release@v2
+        if: startsWith(github.ref, 'refs/tags/v') 
+        with:
+          files: build/libs/*.jar # 把编译出来的 jar 包附加到 Release 中
+          generate_release_notes: true # 自动根据提交记录生成更新日志
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}