[CLIENT-3161] Type stubs: add TypedDict class for the client config dictionary

[juliannguyen4]

• Manually verified that we can import our subclasses of typeddict and use them with the Python client

todo: add test using mypy to check that this doesn't break applications with static checking

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 80.89%. Comparing base (ca2f4be) to head (120f84e).
Report is 7 commits behind head on dev.

Additional details and impacted files

@@           Coverage Diff           @@
##              dev     #690   +/-   ##
=======================================
  Coverage   80.89%   80.89%           
=======================================
  Files         102      102           
  Lines       15186    15186           
=======================================
  Hits        12285    12285           
  Misses       2901     2901           

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.