perf: auto load icons (#688)

* perf: icon

* perf: icon

* doc

* perf: simple edit ui

* doc

* doc

* doc

* doc

projects/app/src/components/Markdown/img/MermaidCodeBlock.tsx

@@ -2,7 +2,7 @@ import React, { useEffect, useRef, memo, useCallback, useState, useMemo } from '
 import { Box } from '@chakra-ui/react';
 // @ts-ignore
 import mermaid from 'mermaid';
-import MyIcon from '../../Icon';
+import MyIcon from '@fastgpt/web/components/common/Icon';
 
 const mermaidAPI = mermaid.mermaidAPI;
 mermaidAPI.initialize({