Replace webpack with rspack (#35460)

Given that this bundler is almost a drop-in replacement to webpack, it
might be worth switching. So far it seems everything is working, but
more testing is needed, so I'm setting draft.

- Dev build time is reduced from 10s to 5s
- Prod build time is reduced from 16s to 10s
- JS output size is reduced from 21.3MB to 19.8MB
- CSS output size is increased from 778kB to 818kB

types.d.ts

@@ -1,8 +1,3 @@
-declare module 'add-asset-webpack-plugin' {
-  const plugin: any;
-  export = plugin
-}
-
 declare module '@techknowlogick/license-checker-webpack-plugin' {
   const plugin: any;
   export = plugin