so will there be a cooking mechanic or is that already implanted in the game ?
Yes, there are cooking mechanic in this game. You can cooking at some spots in dungeon by setting up traveler set. And then, there will have 3 options, Rest/Cooking/Leave.
By the way, it mostly like crafting at crafting table in your hut.
Cooking recipes are 12 and are obtained from Harold & Madeline after camping for the first time.