feat(registry): Add BundUI Components to the registry index

[bundui]

Would like to add BundUI, a growing collection of useful specific function components for React projects built on shadcn and other libraries to the shadcn registry.

Website: https://bundui.io/ Repo: https://github.com/bundui/components

[vercel[bot]]

@bundui is attempting to deploy a commit to the shadcn-pro Team on Vercel.

A member of the Team first needs to authorize it.

[shadcn]

@bundui Looks like https://bundui.io/r/registry.json is 404. Can you check please?

[bundui]

@shadcn the link now works. I also created an issue about this. #8929