[Piece] Add int value functions for color and type

Piece.cpp

@@ -19,9 +19,18 @@ PieceColor Piece::color() const {
     return mColor;
 }
 
+int Piece::colorVal() const {
+    return static_cast<int>(mColor);
+}
+
 PieceType Piece::type() const {
     return mType;
 }
+
+int Piece::typeVal() const {
+    return static_cast<int>(mType);
+}
+
 std::optional<PieceType> Piece::pieceTypeFromSymbol(char symbol) {
     switch (toupper(symbol)) {
     case 'P': return PieceType::Pawn;

Piece.hpp

@@ -32,6 +32,8 @@ public:
 
     PieceColor color() const;
     PieceType type() const;
+    int colorVal() const;
+    int typeVal() const;
 
 private:
     const PieceColor mColor;