Add missing pnpm-parity commands: `vp pm peers check` and `vp pm patch-remove`

### Summary

Direct user feedback suggests Vite+ is still missing a few pnpm-adjacent workflows people expect.

Reference: https://bsky.app/profile/nestor.rip/post/3mssje4iqu22g

### Requested additions

- Add `vp pm peers check`
- Add `vp pm patch-remove`

### Why this matters

There is explicit demand for closer 1:1 support for common pnpm workflows. These gaps stand out for users evaluating Vite+ as a unified package-manager/tooling entry point.