Lj/siwe

[leojacob1]

CHANGES
Use SIWE + NextAuth.js + rainbowkit
Endpoints for auth (/auth/[...nextauth])
Remove withAuthentication wrapper
No more getting jwt directly
Access to session.user at all times in index.tsx component
Use frontend auth token to talk to metabot

Open TODOs
Handle clean disconnect/sign out between SIWE/Nextauth and Rainbowkit
Make sure that session.user exists before making gated requests to metabot at all times!

[height]

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