[PRD/Requirements]: Teacher-centered learner dashboard

[tczerwinski726]

PRD: https://docs.google.com/document/d/1u1UpeibyT1a3qTPxgfo-DwILd7bHu8VlxZEedN5NZjE/edit?tab=t.0#heading=h.1khjmig6utie

Description of the problem

Teachers need information about learners' progress and mastery in order to measure the success of Oppia in their classrooms, the progress and mastery of learners, and to identify learners who require interventions.

Possible solutions / ideas for addressing the problem

No response

Any other relevant context/info

No response