Display avatar when providing a supabase storage file url in avatar_url

[NicolasAlmerge]

When setting a user's raw_user_meta_data's avatar_url attribute to a Supabase Storage file URL (like https://[project-ref].supabase.co/storage/v1/object/public/[bucket]/[file_name]), the avatar is not shown inside the Authentication section. This is because only google user content and github user content images are allowed.

This could be a good idea. It would make distinguishing users easier at scale (for example, by showing their avatar url stored in a supabase storage bucket).