A proposal to use Better Auth instead of Next Auth as a the auth provider

[Bekacru]

Describe the feature you'd like to request

The current implementation of Auth requires a lot of workarounds in the user land to make NextAuth work for both Expo and nextjs, as well as to enable preview deployments.

Describe the solution you'd like to see

Better Auth is a new authentication library with a plugin ecosystem, allowing for easier integration of features like these. It includes Expo integration that works out of the box and supports OAuth logins for preview deployments without needing a proxy server.

Additional information

Perhaps before this is considered, Better Auth should be an optional authentication provider in the Create T3 App. I already have a fork that implements Better Auth for Create T3 Turbo, which you can take a look at.

https://github.com/Bekacru/create-t3-turbo