CodeRabbit Generated Unit Tests: Add generated unit tests

[coderabbitai]

Unit test generation was requested by @asaf-kali.

• ✨ Add UV dependency management #20 (comment)

The following files were modified:

• tests/classic/test_color.py
• tests/classic/test_team.py
• tests/generic/test_board.py
• tests/generic/test_card.py
• tests/generic/test_exceptions.py
• tests/generic/test_move.py
• tests/utils/test_builder.py

[coderabbitai]

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