Add fen loader and a test script for c

engine/include/bitboard.h

@@ -52,6 +52,7 @@ struct Board {
     int fullmove_number;
 };
 
-void create_knight_attack_cache(void);
-void create_pawn_attack_cache(void);
-void create_king_attack_cache(void);
+void create_knight_attack_cache();
+void create_pawn_attack_cache();
+void create_king_attack_cache();
+void print_board();

engine/include/fen.h

@@ -0,0 +1 @@
+int load_fen();