Bump diff and shadcn-ui

Removes [diff](https://github.com/kpdecker/jsdiff). It's no longer used after updating ancestor dependency [shadcn-ui](https://github.com/shadcn/ui/tree/HEAD/packages/cli). These dependencies need to be updated together.


Removes `diff`

Updates `shadcn-ui` from 0.2.3 to 0.9.5
- [Release notes](https://github.com/shadcn/ui/releases)
- [Commits](https://github.com/shadcn/ui/commits/HEAD/packages/cli)

---
updated-dependencies:
- dependency-name: diff
  dependency-version: 
  dependency-type: indirect
- dependency-name: shadcn-ui
  dependency-version: 0.9.5
  dependency-type: direct:production
...

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Author: dependabot[bot]