Fix bundler looking for index.<chunk_hash>.wasm

[greym0uth]

Seems like I missed something in my initial PR as that made it work for vite but didn't work with vite build and vite preview.

It seems newer versions of wasm-pack or at least my version uses import.meta.url for getting the current file, so the existing regex replace isn't capturing it so I get a 404 fetching the wasm as its looking for index.<chunk_hash>_bg.wasm which doesnt exist.

This also uses the transform hook to replace the input in the modulePaths entry file's because I was running into an issue with pnpm caching; I just removed the isNodeModule logic from the buildStart as the transform handles that piece now. I left the cratePaths variant in the buildStart as it relies on the fs.copy so I didn't want to break anything in that aspect.