Add a "threads" feature for mutli-threading

Cargo.toml

@@ -10,6 +10,8 @@ readme = "README.md"
 keywords = ["mcts", "rust", "monte_carlo", "tree", "ai", "ml"]
 categories = ["algorithms", "data-structures"]
 
+[features]
+threads = []
 
 [dependencies]
 rand = "~0.9"
@@ -19,5 +21,5 @@ thiserror = "~2.0"
 divan = "0.1.21"
 
 [[bench]]
-name = "example"
+name = "e2e"
 harness = false

benches/e2e.rs

@@ -189,4 +189,3 @@ impl GameState for TicTacToe {
         &self.current_player
     }
 }
-

examples/auto_tic_tac_toe.rs

@@ -40,7 +40,6 @@ fn main() {
         // Find the best move
         match mcts.search() {
             Ok(action) => {
-                mcts.print_tree();
                 println!(
                     "AI chooses: {} (row {}, col {})",
                     action.index,