Generalize nsec bunker to nostr connect

[staab]

[manimejia]

Imma dive into this once I get oriented to coracle with #167.

[staab]

Great. I think I've mentioned it, but I would really like to see a OAuth workflow for this. That way, clients wouldn't have to build the admin in, key management could happen elsewhere.

So:

• Log in > Log in with key/identity provider
• Ask for a url, or look up the correct provider somehow (like how bitwarden asks what server you want to connect to)
• Initialize OAuth workflow, pass scopes and client id etc over to the auth provider
• Approve/deny scopes
• Redirect to app with nsec bunker token

Bam, very familiar auth workflow for end users, using nsec bunker.