Downloading and uploading progress

[iampopal]

When we upload or download a file
I need to get the progress of downloading or uploading

For example:
supabase.storage.from('avatars').download(path)

Shall give me the progress of downloading

[dshukertjr]

There is currently an open issue on the backend to enable this feature. We should be able to add this feature as soon as the backend is ready.

[Vinzent03]

Closing in favor of #438