implemented transposition table

src/main.rs

@@ -1,7 +1,9 @@
 use chess_engine::engine::Engine;
 use chess_engine::uci::uci_mainloop;
+use chess_engine::zobrist::init_zobrist;
 
 fn main() {
+    init_zobrist();
     let mut engine = Engine::new("Yakari".to_string(), "EiSiMo".to_string());
     uci_mainloop(&mut engine);
 }