added engine factory and adapted command line parsing, added lc0_strategy.py, added stockfish and lc0 standalone engines

chesspp/i_strategy.py

@@ -3,8 +3,11 @@ from abc import ABC, abstractmethod
 import chess
 
 
-# TODO extend class
 class IStrategy(ABC):
+    rollout_depth: int
+
+    def __init__(self, rollout_depth: int = 4):
+        self.rollout_depth = rollout_depth
 
     @abstractmethod
     def pick_next_move(self, board: chess.Board) -> chess.Move: