Support Vite 8 in `@electron-forge/plugin-vite`

[0xlau]

Pre-flight checklist

• I have read the contribution documentation for this project.
• I agree to follow the code of conduct that this project uses.
• I have searched the issue tracker for a feature request that matches the one I want to file, without success.

Problem description

Vite has recently released v8 (https://vite.dev/).
From what I can see, the next branch of Electron Forge currently uses Vite 7, which means @electron-forge/plugin-vite has not yet caught up with the latest Vite release.

Projects using Electron Forge may want to upgrade to Vite 8 to benefit from the latest improvements and ecosystem updates.

Proposed solution

Upgrade @electron-forge/plugin-vite to support Vite 8.

I’m happy to work on this and submit a PR, including addressing any breaking changes introduced between Vite 7 and Vite 8 so the plugin remains compatible.

Alternatives considered

Continue using Vite 7 for now, but this means Electron Forge users cannot adopt the latest Vite features and improvements.

Additional information

No response