Ken-HH24

feat: add cssVariables config

4

Hi, I try to implement the cssVariables config for #191 . Here is what I did to implement this feature. - use `ts-morph` to transform css variables just like [shadcn-ui](https://github.com/shadcn-ui/ui/blob/main/packages/cli/src/utils/transformers/transform-css-vars.ts)....