Virtual Filesystem support

[pjebs]

I have successfully gotten esbuild go package to work.

My plan now is to create a Go-WASM package for the browser that can do all the npm package downloading/resolving and then bundling using esbuild --- All in memory.

Will esbuild support using the io/FS interface so that I can implement a "in-memory" filesystem?

https://pkg.go.dev/io/fs#FS
https://pkg.go.dev/io/fs#ReadFileFS
https://pkg.go.dev/io/fs#StatFS
https://pkg.go.dev/golang.org/x/tools/godoc/vfs

https://github.com/blang/vfs