feat(docs): integrate ElementPlus and enhance learning map content

- Add ElementPlus UI library to VitePress theme configuration
- Improve learning map documentation with collapsible sections and UI components
- Add progress indicators and card components to enhance visual presentation

docs/.vitepress/theme/index.js

@@ -1,4 +1,6 @@
 import DefaultTheme from 'vitepress/theme'
+import ElementPlus from 'element-plus'
+import 'element-plus/dist/index.css'
 import Viewer from 'viewerjs'
 import 'viewerjs/dist/viewer.css'
 import TypeIt from 'typeit'
@@ -8,6 +10,9 @@ import './style.css'
 
 export default {
   extends: DefaultTheme,
+  enhanceApp({ app }) {
+    app.use(ElementPlus)
+  },
   setup() {
     const route = useRoute()
     const { frontmatter } = useData()