feat: add supabase-storage driver

[PikiLee]

🔗 Linked issue

#397

❓ Type of change

• 📖 Documentation (updates to the documentation, readme, or JSdoc annotations)
• 🐞 Bug fix (a non-breaking change that fixes an issue)
• 👌 Enhancement (improving an existing functionality like performance)
• ✨ New feature (a non-breaking change that adds functionality)
• 🧹 Chore (updates to the build process or auxiliary tools and libraries)
• ⚠️ Breaking change (fix or feature that would cause existing functionality to change)

📚 Description

This PR adds a Supabase Storage driver utilizing the “@supabase/supabase-js” package. Additionally, it mocks the storage-related methods of the SupabaseClient for unit tests.

📝 Checklist

• I have linked an issue or discussion.
• I have updated the documentation accordingly.

[pi0]

Thanks again for the PR and sorry it got stuck.

unstorage has a lightweight s3 driver now and supabase storage supports S3 compatible API (in alpha). (there is a compatibility issue for now).

I'm thinking it would be better if we unify on s3 API instead of depending on @supabase/storage-js because it needs more long term maintenance and user dependencies.

I will try to find better contact with supabase team to see how it goes.