Improve typing, add py.typed, bump ruff

[wRAR]

No description provided.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 100.00%. Comparing base (9c09ebc) to head (cbbc848).
⚠️ Report is 14 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff            @@
##              main       #92   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files           18        18           
  Lines          713       716    +3     
  Branches        74        74           
=========================================
+ Hits           713       716    +3     

Files with missing lines	Coverage Δ
zyte_api/__init__.py	100.00% <100.00%> (ø)
zyte_api/__main__.py	100.00% <100.00%> (ø)
zyte_api/_async.py	100.00% <100.00%> (ø)
zyte_api/_errors.py	100.00% <100.00%> (ø)
zyte_api/_retry.py	100.00% <100.00%> (ø)
zyte_api/_sync.py	100.00% <100.00%> (ø)
zyte_api/_utils.py	100.00% <100.00%> (ø)
zyte_api/_x402.py	100.00% <100.00%> (ø)
zyte_api/aio/client.py	100.00% <100.00%> (ø)
zyte_api/aio/errors.py	100.00% <100.00%> (ø)
... and 3 more

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