U2F over NFC

[RvanBaarle]

What's new

• The ability to use U2F via NFC, instead of just over USB
• A load of magic numbers, and some other issues (which I'll fix before I remove the draft status)

Verification

• [ Describe how to verify changes ]

Checklist (For Reviewer)

• [ ] PR has description of feature/bug or link to Confluence/Jira task
• [ ] Description contains actions to verify feature/bugfix
• [ ] I've built this code, uploaded it to the device and verified feature/bugfix