feat: Add time_zone to Datetime column

[Dylan Frankland (dfrankland)]

Motivation

Closes #32

Changes

allows setting a time zone for datetimes and checking if the values in the column matches it

Pertinent polars docs:
https://docs.pola.rs/user-guide/transformations/time-series/timezones/

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 100.00%. Comparing base (08972c6) to head (29b10f8).
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff            @@
##              main       #33   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files           39        39           
  Lines         1887      1890    +3     
=========================================
+ Hits          1887      1890    +3     

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

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.

[Andreas Albert (AndreasAlbertQC)]

Thanks for the nice PR Dylan Frankland (@dfrankland)! Could you add a test in test_sql_schema.py for the oracle part?

[Oliver Borchert (borchero)]

Thanks for the initiative Dylan Frankland (@dfrankland), I think this is a very useful addition! :)

[Dylan Frankland (dfrankland)]

Let me know if you'd like for me to rebase these changes

[Oliver Borchert (borchero)]

All right, nice, I think we're almost there! :)

[Dylan Frankland (dfrankland)]

Updated to keep things minimal and also made the test name more accurate

[Oliver Borchert (borchero)]

Thank you for the updates! Just one tiny comment left :)

[Oliver Borchert (borchero)]

I quickly took care of the small remaining comments to finally merge this -- thanks for your work Dylan Frankland (@dfrankland)!

[Dylan Frankland (dfrankland)]

Oliver Borchert (@borchero) not a problem at all, thank you!