refactor: 项目代码重构，包括 examples、extension 及 core 包

 - remove react-umi-app demo
 - rename lf-engine-browser -> engine-browser-examples
 - rename lf-engine-node -> engine-node-examples
 - extension 包中修改文件夹名大小写未生效，恢复成 Control 和 Node 文件夹，后续再处理

examples/react-umi-app/src/pages/Node/Native/index.tsx → examples/feature-examples/src/pages/NativeNodes/index.tsx

@@ -1,9 +1,9 @@
-import LogicFlow from '@logicflow/core';
-import '@logicflow/core/es/index.css';
+import LogicFlow from '@logicflow/core'
+import '@logicflow/core/es/index.css'
 
-import { Card } from 'antd';
-import { useEffect, useRef } from 'react';
-import styles from './index.less';
+import { Card } from 'antd'
+import { useEffect, useRef } from 'react'
+import styles from './index.less'
 
 const config: Partial<LogicFlow.Options> = {
   isSilentMode: false,
@@ -36,7 +36,7 @@ const config: Partial<LogicFlow.Options> = {
       fontSize: 12,
     },
   },
-};
+}
 
 const data = {
   nodes: [
@@ -90,11 +90,11 @@ const data = {
       text: 'html节点',
     },
   ],
-};
+}
 
 export default function BasicNode() {
-  const lfRef = useRef<LogicFlow>();
-  const containerRef = useRef<HTMLDivElement>(null);
+  const lfRef = useRef<LogicFlow>()
+  const containerRef = useRef<HTMLDivElement>(null)
   useEffect(() => {
     if (!lfRef.current) {
       const lf = new LogicFlow({
@@ -104,16 +104,16 @@ export default function BasicNode() {
         grid: {
           size: 10,
         },
-      });
+      })
 
-      lf.render(data);
-      lfRef.current = lf;
+      lf.render(data)
+      lfRef.current = lf
     }
-  }, []);
+  }, [])
 
   return (
     <Card title="内置基础节点">
       <div ref={containerRef} id="graph" className={styles.viewport}></div>
     </Card>
-  );
+  )
 }

examples/logicflow-demo/src/routes/MainRoutes.js → examples/material-ui-demo/src/routes/MainRoutes.js

@@ -43,7 +43,7 @@ const MainRoutes = {
       path: 'nodes',
       children: [
         {
-          path: 'native-node',
+          path: 'NativeNodes',
           element: <NativeNode />
         }
       ]