Passkey Auth

[skalnik]

HTTP Basic is fine, but this is super annoying on iOS, you cannot save a bookmark with the information pre-saved or anything. So let's bite the bullet and setup a passkey auth workflow. First launch, or maybe with a flag or something, let someone register a passkey, save that data to a static file, and then use that to authenticate against.

Some helpful articles while I was looking into this:

• https://web.dev/articles/passkey-registration
• https://developer.mozilla.org/en-US/docs/Web/API/Web_Authentication_API
• https://dev.to/egregors/passkey-in-go-1efk
• https://github.com/go-webauthn/webauthn
• https://github.com/simonw/tools/blob/main/passkeys.html