feat: 添加跳过pnpm-setup选项以支持自定义pnpm安装

npm-install/action.yml

@@ -15,6 +15,11 @@ inputs:
     required: false
     default: '10'
   
+  skip-pnpm-setup:
+    description: '当 package-manager=pnpm 时是否跳过 pnpm/action-setup (true/false)'
+    required: false
+    default: 'false'
+
   cache-mode:
     description: '缓存模式：node_modules 或 store'
     required: false
@@ -129,7 +134,7 @@ runs:
         echo "缓存key: ${CACHE_KEY}"
 
     - name: 确保 pnpm 可用
-      if: inputs.package-manager == 'pnpm'
+      if: inputs.package-manager == 'pnpm' && inputs.skip-pnpm-setup != 'true'
       uses: pnpm/action-setup@v4
       with:
         version: ${{ inputs.pnpm-version }}