feat(Grid): add customizable background_color property (#50)

- Added sf::Color background_color member with default dark gray
- Python property getter/setter for background_color
- Animation support for individual color components (r/g/b/a)
- Replaces hardcoded clear color in render method
- Test demonstrates color changes and property access

Closes #50
This commit is contained in:
John McCardle 2025-07-06 15:58:17 -04:00
commit ff7cf25806
20 changed files with 104 additions and 4 deletions

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