Vite 8 support / peer dependency update for @react-router/dev

[dino-careaccess]

Hi, Vite 8 is now out (https://vite.dev/blog/announcing-vite8). Could you please add support for it in @react-router/dev?

The current peer dependency range still stops at Vite 7, which appears to be one of the remaining blockers for upgrading.

[aniruddhaadak80]

[rossipedia]

It would be helpful to clearly indicate LLM-generated comments as such.

Or at the very least do a little proof-reading before submitting them.