v0.2.1

Changes

• Add board_to_html() for fixed-cell HTML board rendering in notebooks.
• Add display_board() for Google Colab and Jupyter display with emoji stones.
• Keep print_board() for terminal text output and document display_board() as the recommended Colab option.

v0.2.0

Changes

• Rename the public board value enum from Piece to Cell.
• Move public player classes under othellopy.players.
• Add BeginnerPlayer, IntermediatePlayer, AdvancedPlayer, and ManualPlayer.
• Add othellopy.validation.validate() and validate_detail() for pre-submission player checks.
• Treat invalid player moves as forfeits and expose GameResult.forfeit.
• Render boards with emoji stones when supported, with ASCII fallback.
• Add strict ruff and mypy checks, CI, Apache-2.0 metadata, and OSS project governance documents.