Add package drf-redesign which styles the rest framework browsable API

[DeanElliott96]

Description of change

Rest framework uses bootstrap3 and our security audit raised bootstrap3 as having vulnerabilities. This new package uses bootstrap5 instead and will act as a replacement until DRF updates.

I've added Bootstrap5 and drf_redesign package dependencies so we can self host and don't require any CDNs.

This file api.html is a direct copy from the drf_redesign package. The changes made are to remove the CDNs and rest_framework bootstrap imports. Also some changes to the nav to remove links to the package and DRF.

The collectstatic command has also been updated to ignore files from rest_framework as rest_framework has copies of bootstrap3 which we do not want to be collected and served from our API.

Extra reading if you want:
The Bootstrap issue was raised in the DRF github and the owner has pushed back. You can view the reasons here: Update docs_theme to boostrap V5.x by mostafaei2002 · Pull Request #9404 · encode/django-rest-framework

Checklist

• Has this branch been rebased on top of the current main branch?
• Is the CircleCI build passing?

Before:

After Dark:

After Light:

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 96.47%. Comparing base (7f3d486) to head (bcdaf99).
Report is 5 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #5786   +/-   ##
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  Coverage   96.47%   96.47%           
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  Files        1037     1037           
  Lines       24625    24625           
  Branches     1637     1637           
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  Hits        23758    23758           
  Misses        710      710           
  Partials      157      157           

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