Add excl draw module 2 (#7658)

* init exceldraw module

* excalidraw demo

* i18n fixed bug

* exceldraw change to excalidraw

* lang setting

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Co-authored-by: 杨顺强 <978987373@qq.com>
Co-authored-by: First <first@FirstdeMacBook-Pro.local>

frontend/config/webpack.entry.js

@@ -2,6 +2,7 @@ const paths = require('./paths');
 
 const entryFiles = {
   tldrawEditor: '/tldrawEditor.js',
+  excalidrawEditor: '/excalidraw-editor.js',
   markdownEditor: '/index.js',
   plainMarkdownEditor: '/pages/plain-markdown-editor/index.js',
   TCAccept: '/tc-accept.js',