Chessboard MQTT Graph

Topic /path:

• contains an array of data points like (int x_um, int y_um)[] or "home"
• Path planner sends to this
• Stepper control receives from this

Topic /robotmoves:

• each message is a move like "a1b2"
• Lichess sends to this
• Stockfish sends to this
• Path planner receives from this

Topic /playermoves:

• each message is a move like "a1b2"
• Lichess receives from this
• Stockfish receives from this
• Board Analyzer sends to this

Topic /magnets: