Add support for https://github.com/privatenumber/esbuild-loader like SWC

[justin808]

Check out what we did for SWC:

#29

And create a PR here, like what we did for SWC:
https://github.com/shakacode/react_on_rails_tutorial_with_ssr_and_hmr_fast_refresh

[tomdracz]

Just some notes for anyone looking to pick this up!

Actual new rule setup should be super straightforward - SWC PR linked can be used as good basis on how to determine if loader is available, how to have rule as a function so current filename can be processed etc Easy peasy!

While at it, it could be good to see if we can also swap out Terser plugin for esbuild minifier, which should be faster. More info in article at https://blog.logrocket.com/webpack-or-esbuild-why-not-both/

HOWEVER, unlike Babel & SWC that mostly have feature parity, there are few gotchas with esbuild like:

• No support for HMR (reference How to integrate react-refresh in esbuild to implement hmr ? evanw/esbuild#645)
• No support for ES5 (reference Lowering for ES5? evanw/esbuild#297)
• No automatic polyfills (reference https://twitter.com/appfactory/status/1434130479293288450?s=21)

This is non-exhaustive list, but it does show that using esbuild might not be suitable for everyone. Projects that don't use JSX, don't need to support older browsers might get a better experience here.

Performance boost could be worth it though, so it will be nice to offer this as an option!

[tomdracz]

Looks like I've linked to the wrong issue in the PR, d'oh! We can close this one.

[justin808]

Fixed in #53