[Backend] Convert API endpoints to rest framework

[ryanrrogers]

*** This task must be completed before the unit testing for backend task (#114 )

Currently, most of our API endpoints are using basic http rather than rest framework. Rest framework is a modern solution for building APIs with django. Rest framework provides the tools necessary to build a sustainable and performance-oriented API for Balancer.

Objectives:

1. Convert existing HTTP API views to class-based rest framework views.
2. Ensure API views are relevant to necessary functions of Balancer application.
3. Enhance and overhaul any outdated views.

[lb-cake]

@taichan03 are there any views that might need to be skipped here? I'd like to take this one on if possible

[taichan03]

@lb-cake Hey, Feel free to reach out to Ryan to see which one to convert. We also need an endpoint that can response with a list of meds currently in the system. Do you want to work on that? You can build it with DRF and that is very similar work to this.