Add TT lookups in quiescence, move TT inside Game, remove redundant occupancy and time limit functions

src/board/game.rs

@@ -1,6 +1,7 @@
 use crate::{
     board::fen::from_fen,
     movegen::r#move::{Move, MoveType},
+    search::{transposition_table::TranspositionTable, MAX_TT_SIZE},
 };
 use String as FenError;
 
@@ -27,15 +28,17 @@ pub struct Game {
     pub history: History,
     pub mailbox: Mailbox,
     pub hash: ZobristHash,
+    pub tt: TranspositionTable,
 }
 
 impl Game {
     pub fn new() -> Self {
         Self {
-            board: Board::new(),
+            board: Board::startpos(),
             history: History::new(),
-            mailbox: Mailbox::from_board(&Board::new()),
-            hash: zobrist_keys().calculate_hash(&Board::new()),
+            mailbox: Mailbox::from_board(&Board::startpos()),
+            hash: zobrist_keys().calculate_hash(&Board::startpos()),
+            tt: TranspositionTable::new(MAX_TT_SIZE),
         }
     }