Axum-Login 0.7

[BurntNail]

New update for completely new functionality with more breaking changes than I've had hot breakfasts.

Plan of attack:

• Replicate old functionality in new version
• Utilise new version idiomatically (might be combined with above)
• Start using new features (eg. allow teachers to stop people from adding photos)

[BurntNail]

passkey support might be nice as well? https://lib.rs/crates/passkey

[BurntNail]

nope for the PK, but yes to some other stuff - see #201