Support running remote workers in edge-runtime

Hello!

I have a fork of supabase/edge-runtime that supports loading remote workers in supabase/edge-runtime. I do this because I want load workers from the same http server that serves my frontend, which might not be on the same machine. Is this something that you would consider in your upstream? In my fork I only support remote workers, so its not like I can just open a PR with it (also, its my first time writing rust, so the changes are probably not very good), but would you consider allowing URLs in addition to Paths for all worker loading?

My fork is here by the way:

Thanks!