refactor!: Introduce fully typed clients [WIP]

[vdusek]

Description

• TBD

Issues

• Closes: Write integration tests #21
• Closes: Introduce fully typed client #481

Testing

• TBD

[codecov]

Codecov Report

❌ Patch coverage is 91.47490% with 163 lines in your changes missing coverage. Please review.
✅ Project coverage is 85.02%. Comparing base (54f4cb1) to head (e7558ef).

Files with missing lines	Patch %	Lines
src/apify_client/_resource_clients/run.py	66.10%	20 Missing ⚠️
src/apify_client/_resource_clients/task.py	31.81%	15 Missing ⚠️
src/apify_client/_resource_clients/build.py	42.85%	12 Missing ⚠️
src/apify_client/_resource_clients/schedule.py	36.84%	12 Missing ⚠️
src/apify_client/_resource_clients/user.py	69.23%	12 Missing ⚠️
src/apify_client/_resource_clients/webhook.py	36.84%	12 Missing ⚠️
src/apify_client/_resource_clients/actor.py	74.28%	9 Missing ⚠️
...rc/apify_client/_resource_clients/actor_env_var.py	33.33%	8 Missing ⚠️
...rc/apify_client/_resource_clients/actor_version.py	46.66%	8 Missing ⚠️
src/apify_client/_resource_clients/dataset.py	75.00%	8 Missing ⚠️
... and 12 more

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #554      +/-   ##
==========================================
+ Coverage   76.01%   85.02%   +9.01%     
==========================================
  Files          42       41       -1     
  Lines        2468     3866    +1398     
==========================================
+ Hits         1876     3287    +1411     
+ Misses        592      579      -13     

Flag	Coverage Δ
integration	83.54% <91.10%> (+14.58%)	⬆️
unit	74.34% <85.19%> (+9.75%)	⬆️

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