chore: update the script of the project

Author: gaoli

README.en-US.md

@@ -104,5 +104,5 @@ $ cd gg-editor
 $ npm install
 
 # Run examples
-$ npm doc:start
+$ npm start
 ```

README.md

@@ -104,5 +104,5 @@ $ cd gg-editor
 $ npm install
 
 # 运行示例
-$ npm doc:start
+$ npm start
 ```

docs/guide/getting-started.md

@@ -99,5 +99,5 @@ $ cd gg-editor
 $ npm install
 
 # Run examples
-$ npm doc:start
+$ npm start
 ```

docs/guide/getting-started.zh-CN.md

@@ -99,5 +99,5 @@ $ cd gg-editor
 $ npm install
 
 # 运行示例
-$ npm doc:start
+$ npm start
 ```

package.json

@@ -20,9 +20,10 @@
     "src"
   ],
   "scripts": {
+    "start": "npm run docs:start",
     "build": "node ./scripts/build.js",
-    "doc:start": "dumi dev",
-    "doc:build": "dumi build",
+    "docs:start": "dumi dev",
+    "docs:build": "dumi build",
     "lint": "eslint --cache --ext .ts,.tsx ./src",
     "lint:fix": "npm run lint -- --fix",
     "pretty-quick": "pretty-quick",