feat: API documentation site using Github pages

[BulkBeing]

This PR creates a new API documentation site for Python SDK for hosting using Github pages.

As of now I have not made it part of the CI pipeline, generating documentation has to be ran from one of the maintainers laptop (anyone who has push access to docs-site branch on this repo).
Run below command from main branch and it will generate the docs and push it to docs-site branch:

make docs-deploy-version VERSION=0.11

This uses mike to manage multiple versions of the documentation. So when more versions are available, there will be an option to switch between different versions of the documentation site like below:

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 93.91%. Comparing base (2ebe47f) to head (5dcc129).

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #303      +/-   ##
==========================================
+ Coverage   93.81%   93.91%   +0.09%     
==========================================
  Files          66       66              
  Lines        3058     3055       -3     
  Branches      159      156       -3     
==========================================
  Hits         2869     2869              
  Misses        139      139              
+ Partials       50       47       -3     

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[vigith]

Perhaps we should add something in CI to make sure the docs are updated and if not CI should fail?