Consider making use of @nrwl/vite

Now that Nx supports [Vite and Vitest](https://nx.dev/packages/vite) to some extent, we may be able to simplify this plugin by reusing their executors.

Pros
- Less maintenance
- Possibly fewer bugs, since more eyes are on @nrwl/vite

Cons
- Need to wait for @nrwl/vite to update packages (they're usually a month+ behind)
- Up front work to convert our code