ruff: require function annotations

[Javagedes]

Adds the rule ANN which requires function annotations. See https://beta.ruff.rs/docs/rules/#flake8-annotations-ann for more information.

Only adds type annotations to function headers so this will have no effect on the codebase itself.

closes #208

[codecov]

Codecov Report

Attention: 3 lines in your changes are missing coverage. Please review.

Comparison is base (9c78d80) 81.18% compared to head (5726ada) 81.26%.

Files	Patch %	Lines
edk2toollib/utility_functions.py	82.35%	3 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #370      +/-   ##
==========================================
+ Coverage   81.18%   81.26%   +0.08%     
==========================================
  Files          57       57              
  Lines        7372     7404      +32     
==========================================
+ Hits         5985     6017      +32     
  Misses       1387     1387              

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