FEATURE REQUEST: Internal replits and analytics for cohorts based on current react-exercises platform

This is based on a discussion we had on slack.

Originally, Erwin Aguero said:
"Could be an option to create a online report for teacher and TA in order to create plans with milestones for the students ?"

The current replit system doesn't have an API to support this and we would have to build based on web hooks if we continue to use them.

The assertion is that we should build a new extension to the platform (collection of features and views) that deal with this both on the teacher and student side.

Teachers:
- analytics
- student plan

Students:
- built in exercises in a new view

I'd like to open the floor and continue this discussion so we can form a plan for feature below.

The issue describes a discussion about teacher analytics and student plans, plus built-in student exercises, but does not identify files, tests, or an entry point. First read the discussion and inspect the existing client to understand the proposed scope; the issue does not define a concrete done condition.

Written by the indexing model from the issue text.