Add Swagger Serving Command

[devleejb]

What this PR does / why we need it:

This PR focuses on defining the ConnectRPC API Docs as an OpenAPI Spec and includes adding a Swagger serving command. By converting the API docs to an OpenAPI Spec, it enhances the readability, consistency, and ease of use for developers utilizing the ConnectRPC API.

Which issue(s) this PR fixes:

Fixes #804

Special notes for your reviewer:

To access swagger, run make docker-swagger and access to localhost:3000.

Does this PR introduce a user-facing change?:

Additional documentation:

Checklist:

• Added relevant tests or not required
• Didn't break anything

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 50.71%. Comparing base (0987cbc) to head (e0e32ca).

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #812   +/-   ##
=======================================
  Coverage   50.71%   50.71%           
=======================================
  Files          70       70           
  Lines       10213    10213           
=======================================
  Hits         5180     5180           
  Misses       4512     4512           
  Partials      521      521           

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[hackerwins]

Thanks for your contribution.