initial rewrite of lazy_children logic

src/logic/move.rs

@@ -86,4 +86,11 @@ impl Move {
 
         BVM.board_value(&self.board, agent_color)
     }
+
+    /// Sort children of the [`Move`] by their self_value in `arena`
+    pub fn sort_children(&mut self, arena: &[Move]) {
+        // negative, because we want the max value to be at the first index
+        // abs because we want the most EXTREME possible outcome (win or lose for example)
+        self.children.sort_by_key(|&i| -arena[i].self_value.abs());
+    }
 }