feat: added cookie handling

[philprime]

No description provided.

[github-actions]

	Warnings
⚠️	The library files were changed, but the tests remained unmodified. Consider updating or adding to the tests to match the library changes.

Generated by 🚫 Danger Swift against ebdb958

[codecov-commenter]

Codecov Report

Attention: 7 lines in your changes are missing coverage. Please review.

Comparison is base (7a33ab6) 57.89% compared to head (16f5f57) 58.32%.

Files	Patch %	Lines
Sources/Postie/Cookies/RequestCookies.swift	42.85%	4 Missing ⚠️
Sources/Postie/Cookies/ResponseCookies.swift	84.61%	2 Missing ⚠️
Sources/Postie/Encoder/RequestEncoding.swift	87.50%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #37      +/-   ##
==========================================
+ Coverage   57.89%   58.32%   +0.42%     
==========================================
  Files          63       65       +2     
  Lines        1577     1610      +33     
==========================================
+ Hits          913      939      +26     
- Misses        664      671       +7     

Flag	Coverage Δ
unittests	58.32% <79.41%> (+0.42%)	⬆️

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