Prototype schema browser

[JeremyMcCormick]

Checklist

• Ran Jenkins
• Added a release note for user-visible changes to docs/changes

[codecov]

Codecov Report

❌ Patch coverage is 77.60417% with 43 lines in your changes missing coverage. Please review.
✅ Project coverage is 90.61%. Comparing base (0d0033e) to head (3b62510).
⚠️ Report is 2 commits behind head on main.

Files with missing lines	Patch %	Lines
python/felis/cli.py	30.30%	23 Missing ⚠️
python/felis/browser/render.py	87.26%	11 Missing and 9 partials ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #186      +/-   ##
==========================================
- Coverage   91.81%   90.61%   -1.21%     
==========================================
  Files          13       15       +2     
  Lines        2066     2258     +192     
  Branches      300      334      +34     
==========================================
+ Hits         1897     2046     +149     
- Misses        110      144      +34     
- Partials       59       68       +9     

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