Display human-friendly progress when starting wasmer run

[Michael-F-Bryan]

This fixes #3981 by adding some spinners during certain parts of the startup process.

I've mostly done this by creating a wrapper wasmer_wasix::Runtime implementation that will display progress bars during certain operations. Unfortunately, our current abstractions don't really expose the hooks we'd want for fine-grained progress updates like telling people how many bytes have been downloaded for a certain package, and some expensive operations (e.g. module compilation) aren't possible to hook into for reporting progress, but I guess it's better than nothing 🤷