[board] Pretty print a board with rank and file notations but no pieces

board/src/position.rs

@@ -126,7 +126,28 @@ impl fmt::Debug for Position {
 
 impl fmt::Display for Position {
     fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
-        write!(f, "abcdefg")
+        let mut output = String::new();
+
+        output.push_str("   +-----------------+\n");
+
+        for rank in (0..8).rev() {
+            output.push_str("{rank} | ");
+
+            for file in 0..8 {
+                let square = Square::from_rank_file(rank, file);
+                // TODO: Get piece at square
+                output.push_str(". ");
+            }
+
+            output.push_str("|\n");
+        }
+
+        output.push_str("   +-----------------+\n");
+        output.push_str("     a b c d e f g h\n");
+
+        write!(f, "{}", output)
+    }
+}
 
 #[cfg(test)]
 mod tests {