Include Svelte and Solid in tagline description of auth-ui

[JPVan]

Improve documentation

Link

https://github.com/supabase-community/auth-ui

Describe the problem

About: Pre-built Auth UI for React

This is confusing because it doesn't list Svelte and Solid

Describe the improvement

Pre-built Auth UI for React / Svelte / Solid

Additional context

When searching for UI for Svelte or Solid, people who find this repo will think it isn't what they are looking for