feat: Script and HasIsland available at multiple runtimes by replacing renderer source

[usualoma]

I believe that runtime compatibility has been solved by the approach of rewriting the import statement ( like #161 ).
The challenge now is how to provide a compatible useRequestContext.

The approach tried in #168, using AsyncLocalStorage, is a wholly runtime-independent and clean method, but
@yusukebe's research has shown that it may cause poor DX in Cloudflare Pages, so it is better not to use it.

So what do we do now?

Although relying on the renderer implementation is not clean (compared to AsyncLocalStorage), realistically, the renderer used in honox is hono/jsx-renderer or @hono/${jsxImportSource}-renderer, so replacing this would provide multi-runtime support.

[usualoma]

@yusukebe How about this approach?

[yusukebe]

Thank you @usualoma !

It's interesting, interesting... But, hmm.

I think some user may create their own renderer with React or another UI library without using the specific package like @hono/ui-library. So, I think it's not good to replace hono/jsx-renderer strings.

But I don't have any good idea now. I'll be thinking about it.

As you said, when I think deeply about it, I think again we want to use AsyncLocalStorage. I'll check if I can easily use it with Cloudflare Pages again.