feat: role management page with component tree (#5675)

* feat: add shadcn tree

* fix: update vbenTree component

* feat: role management demo page

* feat: add cellSwitch renderer for vxeTable

* chore: remove tree examples

playground/src/api/system/index.ts

@@ -0,0 +1,3 @@
+export * from './dept';
+export * from './menu';
+export * from './role';