Caissa

Note: piece assets are from https://chess.com/ and sound effects from https://lichess.org/

Move calculating checklist:

• PAWN capture
• PAWN march
• BISHOP cross
• KNIGHT jump
• ROOK slide
• QUEEN slide+cross
• KING one-ranged slide+cross
• En passant
• Check coercion
• Check dodging
• Promotion (only to queen)
• Castling

  Disclaimer: move generation code is currently very repetitive for performance reasons, refactor coming soon