Update FHIR converter API docs

[emmastephenson]

PULL REQUEST

Summary

Update the API docs for the FHIR converter.

Changes include:

• renaming the FHIR-Converter-Installation-And-Usage-Guide.md to description.md so it appears in the /redoc endpoint
• Updating some of the content on that page to be more in line with our other API doc descriptions
• Adding documentation to the /convert-to-fhir endpoint
• Adding descriptions to request params
• Adding valid sample requests & responses

Related Issue

Fixes #487

Additional Information

Docs page before:

Docs page after:

[codecov]

Codecov Report

Merging #521 (cd194c8) into main (08b7733) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##             main     #521   +/-   ##
=======================================
  Coverage   96.49%   96.49%           
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  Files          45       45           
  Lines        2479     2479           
=======================================
  Hits         2392     2392           
  Misses         87       87           

Flag	Coverage Δ
unit-tests	96.49% <ø> (ø)

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[emmastephenson]

@robertmitchellv I realize this might have conflicts with #520 and #526 - I'm happy to resolve the merge conflicts once your PRs are in!

[robertmitchellv]

@emmastephenson I don't think there will be too much conflict with #520 and #526 but thanks for agreeing to sort through the differences after those two land 🙇🏻

I like the changes to the docs with more instructions (especially highlighting Podman as an alternative for managing OCI containers and pods 🤩). I don't have any additional feedback--looks great to me!