implemented random controller

src/lib/controller/random.rs

@@ -0,0 +1,13 @@
+use rand::random;
+
+use super::{Controller, ControllerError, Move};
+use crate::lib::grid::Grid;
+
+pub struct RandomController;
+
+impl Controller for RandomController {
+	fn next_move(&mut self, _grid: &Grid) -> Result<Move, ControllerError> {
+		let movement = random();
+		Ok(movement)
+	}
+}