This PR adds a `nxCopyAssetsPlugin` for Vite to brings it to parity with
the other compilers/bundlers (tsc, swc, esbuild, rollup, and webpack).
When generate a lib with Vite (e.g.`nx g @nx/js:lib --bundler=vite` or
`nx g @nx/react:lib --bundler=vite`), we expect it to at least copy
`README.md` as an asset.
Note: Vite has support for copying assets from `public/` but that is
less flexible and more intended for apps, not libs.
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## Current Behavior
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## Expected Behavior
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## Related Issue(s)
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merged. -->
Fixes#27351
- Update Vitest `cache.dir` to be scoped to each project root to avoid
collisions (same as what's already done for Vite)
- Normalize Vite `cacheDir` to avoid trailing `/.` paths for root
projects
- Fix Remix & Storybook Vite `cacheDir` generation
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## Current Behavior
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## Expected Behavior
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## Related Issue(s)
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Fixes#21775
