新增 action.yml 文件，定义一个简单的“Hello World”工作流

action.yml

@@ -0,0 +1,13 @@
+name: "Hello World"
+description: "Greet someone"
+runs:
+  using: "composite"
+  steps:
+    - name: Checkout
+      id: checkout
+      uses: actions/checkout@main
+    - uses: actions/setup-node@v4
+      id: setup-node
+      with:
+        node-version: lts/*
+        cache: ''