feat: integrate auth with client

[elijahmorg]

What kind of change does this PR introduce?

Add ability to use gotrue for auth

What is the current behavior?

#8

What is the new behavior?

Feel free to include screenshots if it includes visual changes.

Additional context

Add any other context or screenshots.

[elijahmorg]

I've taken this out of WIP state. I think the overall changes are ready and it provides basic auth functionality.

It is however blocked pending this getting merged in so I can update the go.mod to not point to a local postgrest-go. https://github.com/supabase-community/postgrest-go/pull/48

[elijahmorg]

@tranhoangvuit I believe I've address all your comments! Thanks for providing the feedback. I'll try to more closely mirror supabase-js with my next PRs.