Comprehensive docstrings

[aniketmaurya]

What does this PR do?

Add more comprehensive docstrings which is developer friendly.

Before submitting

• Was this discussed/agreed via a Github issue? (no need for typos and docs improvements)
• Did you read the contributor guideline, Pull Request section?
• Did you make sure to update the docs?
• Did you write any new necessary tests?

PR review

Anyone in the community is free to review the PR once the tests have passed.
If we didn't discuss your PR in GitHub issues there's a high chance it will not be merged.

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 85%. Comparing base (a7b5910) to head (07636b2).
Report is 5 commits behind head on main.

Additional details and impacted files

@@         Coverage Diff         @@
##           main   #545   +/-   ##
===================================
  Coverage    85%    85%           
===================================
  Files        38     38           
  Lines      2901   2901           
===================================
  Hits       2479   2479           
  Misses      422    422           

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