feat(renderer): add ContentDrawable to View for direct drawing

[aymanbagabas]

This commit introduces a new field, ContentDrawable, to the View struct, allowing to provide a uv.Drawable as the content of the view. This enables more efficient rendering for complex views by allowing direct drawing to the underlying buffer directly without converting to a string first.

[codecov]

Codecov Report

❌ Patch coverage is 50.00000% with 8 lines in your changes missing coverage. Please review.
✅ Project coverage is 55.52%. Comparing base (640d879) to head (44da67e).

Files with missing lines	Patch %	Lines
cursed_renderer.go	57.14%	3 Missing and 3 partials ⚠️
input.go	0.00%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1562      +/-   ##
==========================================
- Coverage   55.64%   55.52%   -0.13%     
==========================================
  Files          25       25              
  Lines        1310     1322      +12     
==========================================
+ Hits          729      734       +5     
- Misses        491      496       +5     
- Partials       90       92       +2     

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