Endpoints for managing LAGG interfaces

[jaredhendrickson13]

Is your feature request related to existing pfSense functionality that is missing from the API? Please describe.
Endpoints equivalent to /interfaces_lagg.php and /interfaces_lagg_edit.php

Is your feature request related to a problem? Please describe.
N/A

Describe the solution you'd like
API endpoints to create, read, update and delete LAGG interfaces.

Describe alternatives you've considered
N/A

Additional context
Submitting on behalf of a private request.