Use Vite4 or Vite5 manifests, not both

[KieranP]

Description 📖

This fixes an issue where upgrading to Vite5 was merging old Vite4 and Vite5 manifests together, creating JS errors.

Background 📜

This was happening because vite_ruby was merging vite4 and vite5 manifests together.

The Fix 🔨

Check for Vite5 manifests. If present, use those, otherwise fall back to Vite4 manifests.

Amends #420

[rgioia]

I'm going through the same problem.

[emptyflask]

I just upgraded to Vite 5 and am dealing with this now as well.

[benlangfeld]

Hey @ElMassimo , is there anything that needs to be done here before this can be merged?

[sbastn]

@ElMassimo we're eager to see this merged. Is there anything we can do to help?

[benlangfeld]

@ElMassimo Could this please be merged and included in the next release?

[rmehner]

Is there anything we can do to help with getting this released?