Removed dependency on global variable for chess960 detection and update move notation styles.

[lepned]

Introduced new properties for castling moves and updated move notation styles to use Coordinates.

• Removed dependency on static variable MGPositionConstants.IsChess960
• MGMove: Added properties for legacy and Chess960 castling.
• MGMoveDump, MGMoveFromString, PositionWithHistory: Updated to use Coordinates notation style.
• MCTSNodeInitPolicy: Adjusted threshold for Chess960 castling moves.
• UCIManager, UCIInfo: Updated best move output to use Coordinates notation style.