Init doesn't follow codebase indentation convention

[yanghuidong]

A minor issue: when the init script generates the theme files and updates panda.config.ts, it always uses Spaces, whereas the codebase might be configured to use Tabs instead. Ideally, the exiting indentation convention can be detected before outputting. For example, by reading biome.json for Biome users, or else Prettier / ESLint config files, etc.

Thanks!