Add pydocstyle for docstring checks

[kaxil]

pydocstyle is a static analysis tool for checking compliance with Python docstring conventions.

https://www.pydocstyle.org/en/stable/index.html

[codecov]

Codecov Report

Merging #105 (fef6723) into main (bd07c3d) will increase coverage by 0.05%.
The diff coverage is 100.00%.

❗ Current head fef6723 differs from pull request most recent head 1d21f65. Consider uploading reports for the commit 1d21f65 to get more accurate results

@@            Coverage Diff             @@
##             main     #105      +/-   ##
==========================================
+ Coverage   90.10%   90.15%   +0.05%     
==========================================
  Files          35       35              
  Lines        1880     1890      +10     
==========================================
+ Hits         1694     1704      +10     
  Misses        186      186              

Impacted Files	Coverage Δ
...nomer/providers/amazon/aws/hooks/base_aws_async.py	87.50% <ø> (ø)
...mer/providers/amazon/aws/hooks/redshift_cluster.py	26.78% <ø> (ø)
astronomer/providers/amazon/aws/hooks/s3.py	94.95% <ø> (ø)
...providers/amazon/aws/operators/redshift_cluster.py	85.71% <ø> (ø)
astronomer/providers/core/sensors/filesystem.py	94.11% <ø> (ø)
astronomer/providers/core/triggers/filesystem.py	83.33% <ø> (ø)
...stronomer/providers/databricks/hooks/databricks.py	95.16% <ø> (ø)
astronomer/providers/google/cloud/sensors/gcs.py	95.83% <ø> (ø)
astronomer/providers/google/cloud/triggers/gcs.py	100.00% <ø> (ø)
astronomer/providers/http/sensors/http.py	81.81% <ø> (ø)
... and 24 more

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