#### What type of PR is this?
/area ui
/kind improvement
/milestone 2.21.x
#### What this PR does / why we need it:
1. Add ghost variant
2. Improve icon style
3. Refactoring css using scss functions
#### Does this PR introduce a user-facing change?
```release-note
None
```
#### What type of PR is this?
/area core
/kind cleanup
#### What this PR does / why we need it:
Remove unused dependencies and configuration files
#### Does this PR introduce a user-facing change?
```release-note
None
```
#### What type of PR is this?
/area ui
/kind improvement
/milestone 2.16.x
#### What this PR does / why we need it:
升级 Vite 至 5.x。
#### Does this PR introduce a user-facing change?
```release-note
升级 UI 部分的 Vite 版本至 5.x。
```
Ryan Wang