fix: linear gradient angles

[Tropix126]

Closes #913

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 11 lines in your changes missing coverage. Please review.

Project coverage is 76.03%. Comparing base (dab3178) to head (fe122c0).
Report is 9 commits behind head on main.

Files with missing lines	Patch %	Lines
crates/state/src/values/gradient.rs	0.00%	11 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #921      +/-   ##
==========================================
- Coverage   76.05%   76.03%   -0.02%     
==========================================
  Files         207      207              
  Lines       23298    23303       +5     
==========================================
  Hits        17719    17719              
- Misses       5579     5584       +5     

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[marc2332]

So nice! Thanks @Tropix126 !