feat(next/auth): Allow passing additional options (e.g., depth) to login function in @payloadcms/next/auth

[a95z]

The current login function exported from @payloadcms/next/auth is convenient and clean, but it's very limited in certain real-world use cases because it does not allow passing additional options to the underlying payload.login call.

Specifically, I needed to retrieve the authenticated user with related data populated (e.g., a cart field with depth: 3). However, the built-in login does not allow forwarding standard options like depth, locale, or overrideAccess, even though these are accepted by payload.login under the hood.