uwasi instread of browser_wasi_shim

The current Ruby.Wasm is written with separate implementations for Node and Browser.
I can see considerable ingenuity and hard work. Thank you for all the work you have done. Now, I have found a way to solve this difficulty.
The swiftwasm team is developing uwasi, which seems to cover both Node and Browser implementations.
Asciidoctor-wasm implements DefaultRubyVM using this uwasi.

https://github.com/tani/asciidoctor-wasm/blob/f7a240f03c4d33d1235f68cda2497bda874988a0/src/asciidoctor.ts#L1-L21

If this implementation is adopted so that there is no need to separate the Browser and Node implementations, users will not have to distinguish between the Import of the Node and Browser implementations when using Ruby.wasm, which would be a great improvement. Please consider this.

Cheers

Ruby.Wasm の Node 用と Browser 用に分かれた実装、特に browser_wasi_shim の使用方法を、uwasi を使用するリンク先の asciidoctor.ts の DefaultRubyVM 実装と比較する。完了の条件は、ユーザーが Node と Browser の import を区別する必要がなくなる、uwasi ベースの共有統合を実現し、両方の環境で動作を確認すること。