feat/supabase stograge (s3)

**Is your feature request related to a problem? Please describe.**
My files are stored on S3-like Supabase storage. I'd like to connect it as a source for the Unstructured workflows.

**Describe the solution you'd like**
Make S3 Adapter in Unstructured work with Supabase

**Describe alternatives you've considered**
Other S3 providers like Cloudflare?

