[P0] Add Course Review Model & Endpoints

[SirajChokshi]

Endpoints:

• Route /reviews
  • GET - all reviews with filters (by class, etc)
  • POST - create new review, generate an ID, and return it
• Route /reviews/<id>
  • GET - a review of the specified ID
  • PATCH - update this review

Model:

id: string
title: string
rating: int[range: 0,5]
desc: string
lastEdited: Date
created: Date
author: UserID