docs(quickstart): add register Lazyload guide (#6110)

docs/markdown/quickstart.en-US.md

@@ -115,6 +115,9 @@ The easiest way to use Vant is to include a CDN link in the html file, after whi
 
   // Call function component
   vant.Toast('Message');
+
+  // Register Lazyload directive
+  Vue.use(vant.Lazyload);
 </script>
 ```
 

docs/markdown/quickstart.zh-CN.md

@@ -132,6 +132,10 @@ Vue.use(Vant);
 
   // 调用函数组件，弹出一个 Toast
   vant.Toast('提示');
+
+  // 通过 CDN 引入时不会自动注册 Lazyload 组件
+  // 可以通过下面的方式手动注册
+  Vue.use(vant.Lazyload);
 </script>
 ```
 

packages/vant-cli/README.md

@@ -45,8 +45,8 @@ yarn add @vant/cli --dev
     }
   },
   "lint-staged": {
-    "*.{ts,tsx,js,jsx,vue}": ["eslint", "git add"],
+    "*.{js,jsx,ts,tsx,vue}": "eslint --fix",
-    "*.{vue,css,less,scss}": ["stylelint", "git add"]
+    "*.{vue,css,less,scss}": "stylelint --fix"
   },
   "eslintConfig": {
     "root": true,