Function encode_board_as_binary 

pub fn encode_board_as_binary(board: &Board<ChessPiece>) -> Vec<u8> 

Encodes a simple_chess board into a binary vector representation.

Arguments

• board - A reference to a Board<ChessPiece> representing the simple_chess board to be encoded.

Returns

A Vec<u8> where each byte represents two simple_chess pieces on the board. The encoding is such that:

• The board is traversed from top to bottom, left to right.

• Each pair of consecutive spaces on the board is encoded into a single byte.

• The first piece in the pair is stored in the higher 4 bits of the byte, and the second piece in the lower 4 bits.

• If a space is empty, it is represented by 0b0000.

• If a space has a piece on it, it uses the following table to generate a 4 byte code as {piece_type}{color}

  Square State	Bit representation
  Empty	000
  Pawn	001
  Rook	010
  Knight	011
  Bishop	100
  King	101
  Queen	110

  Color	Bit
  White	0
  Black	1