R1:33a95d44bdc7

Formally modularize MFA/TOTP tokens, provide a module panel for temporary tokens

Summary:
Ref T10603. We have a couple of sort of ad-hoc tokens, so start formalizing them. First up is MFA tokens.

Also adds a new config module panel for these.

Test Plan:
- Added MFA.
- Added MFA, intentionally fumbled the input, completed the workflow.
- Removed MFA.
- Viewed tokens, saw MFA sync tokens.
- Viewed new module config panel.

{F1177014}

Reviewers: chad

Reviewed By: chad

Maniphest Tasks: T10603…