Let swc_bundler run on the browser using wasm

[eng-cc]

I am working on a pure web code editor, hoping to compile and package Typescript code in the browser.

If we can abstract the part of reading and writing files in swc_bundler, we can use the external callback to get\set files, so that swc_bundler can be used in the browser.

I hope to get some advice on feasibility, if the solution is feasible, I plan to help doing it.

similar question: #7642

[kwonoj]

Please do not create duplicates with already answered.