feat: 添加 npm 依赖安装与缓存的 GitHub Action，支持多种包管理器，优化 CI/CD 流程，提供详细的缓存状态和安装总结。

npm-install/examples/multi-project.yml

@@ -0,0 +1,89 @@
+# 多项目/多目录示例
+name: 多项目构建
+
+on:
+  push:
+    branches: [ main ]
+
+jobs:
+  frontend:
+    runs-on: ubuntu-latest
+    
+    steps:
+      - name: 检出代码
+        uses: actions/checkout@v4
+
+      - name: 设置Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: '18'
+
+      - name: 安装前端依赖
+        uses: actions/xgj/npm-install@v1
+        with:
+          package-manager: 'yarn'
+          node-modules-path: './frontend/node_modules'
+          cache-prefix: 'frontend'
+
+      - name: 构建前端
+        working-directory: ./frontend
+        run: yarn build
+
+      - name: 前端测试
+        working-directory: ./frontend
+        run: yarn test
+
+  backend:
+    runs-on: ubuntu-latest
+    
+    steps:
+      - name: 检出代码
+        uses: actions/checkout@v4
+
+      - name: 设置Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: '18'
+
+      - name: 安装后端依赖
+        uses: actions/xgj/npm-install@v1
+        with:
+          package-manager: 'npm'
+          node-modules-path: './backend/node_modules'
+          cache-prefix: 'backend'
+
+      - name: 后端测试
+        working-directory: ./backend
+        run: npm test
+
+      - name: 构建后端
+        working-directory: ./backend
+        run: npm run build
+
+  docs:
+    runs-on: ubuntu-latest
+    
+    steps:
+      - name: 检出代码
+        uses: actions/checkout@v4
+
+      - name: 设置Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: '18'
+
+      - name: 安装文档依赖
+        uses: actions/xgj/npm-install@v1
+        with:
+          package-manager: 'pnpm'
+          node-modules-path: './docs/node_modules'
+          cache-prefix: 'docs'
+
+      - name: 构建文档
+        working-directory: ./docs
+        run: pnpm build
+
+      - name: 部署文档
+        if: github.ref == 'refs/heads/main'
+        working-directory: ./docs
+        run: pnpm deploy