[board] Move neighbor::Direction → square::Direction

board/src/square.rs

@@ -1,8 +1,18 @@
 // Eryn Wells <eryn@erynwells.me>
 
-use crate::neighbor::Direction;
 use std::str::FromStr;
 
+pub enum Direction {
+    North,
+    NorthWest,
+    West,
+    SouthWest,
+    South,
+    SouthEast,
+    East,
+    NorthEast,
+}
+
 #[derive(Debug)]
 pub struct ParseSquareError;