Changed visibility from package to interal

Sources/Engine/Pieces/CommonMoves.swift

@@ -0,0 +1,19 @@
+internal protocol DiagonalMoves {
+    func getDiagonalMoves(from pos: Square.Position) -> [Square.Position]
+}
+
+extension DiagonalMoves {
+    func getDiagonalMoves(from pos: Square.Position) -> [Square.Position] {
+        return []
+    }
+}
+
+internal protocol LinearMoves {
+    func getLinearMoves(from pos: Square.Position) -> [Square.Position]
+}
+
+extension LinearMoves {
+    func getLinearMoves(from pos: Square.Position) -> [Square.Position] {
+        return []
+    }
+}