Replacing sphinx-tabs with sphinx-design

[davidorme]

Description

@jacobcook1995 This is entirely trivial but we have two packages in our dev stack that provide the same functionality. We use sphinx-design for the nice cards and it also does tabs. This PR just subs sphinx-tabs out and duplicates the code tabs you added recently using sphinx-design.

The styling is very slightly different, but the functionality is the same.

Fixes #705

Type of change

• New feature (non-breaking change which adds functionality)
• Optimization (back-end change that speeds up the code) ◀️ Very very arguably 😄
• Bug fix (non-breaking change which fixes an issue)

Key checklist

• Make sure you've run the pre-commit checks: $ pre-commit run -a
• All tests pass: $ poetry run pytest

Further checks

• Code is commented, particularly in hard-to-understand areas
• Tests added that prove fix is effective or that feature works
• Relevant documentation reviewed and updated

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 94.66%. Comparing base (bc8c2fa) to head (1124a54).
Report is 4 commits behind head on develop.

Additional details and impacted files

@@           Coverage Diff            @@
##           develop     #706   +/-   ##
========================================
  Coverage    94.66%   94.66%           
========================================
  Files           73       73           
  Lines         4833     4833           
========================================
  Hits          4575     4575           
  Misses         258      258           

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[jacobcook1995]

LGTM!