CLI to Generate OpenAPI Schema

[tieneupin]

As part of improving our ability to keep the Murfey frontend in lockstep with changes to the API endpoints in Murfey, we need a way to quickly generate and pass the latest OpenAPI schema for Murfey to the frontend.

This PR introduces a CLI to do just that, allowing you to generate OpenAPI schemas of either the instrument or backend servers and to save them in either JSON or YAML format. This can then be used by the frontend to generate and update its own copy of the OpenAPI schema.

[codecov]

Codecov Report

❌ Patch coverage is 73.86364% with 23 lines in your changes missing coverage. Please review.
✅ Project coverage is 38.51%. Comparing base (e292f91) to head (c8189c3).
⚠️ Report is 2 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #691      +/-   ##
==========================================
+ Coverage   38.24%   38.51%   +0.27%     
==========================================
  Files          97       99       +2     
  Lines       11594    11662      +68     
  Branches     1529     1542      +13     
==========================================
+ Hits         4434     4492      +58     
- Misses       6964     6972       +8     
- Partials      196      198       +2     

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