docs: add python binding docstrings

[kazdy]

Description

resolves: #70

google style docstrings: https://sphinxcontrib-napoleon.readthedocs.io/en/latest/example_google.html

How are the changes test-covered

• [x] N/A
• [ ] Automated tests (unit and/or integration tests)
• [ ] Manual tests
  • [ ] Details are described below

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 90.53%. Comparing base (10c55c1) to head (2249fe4). Report is 1 commits behind head on main.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #169 +/- ## ======================================= Coverage 90.53% 90.53% ======================================= Files 19 19 Lines 961 961 ======================================= Hits 870 870 Misses 91 91 ```

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