Add local/offline mode even in worlds

[woxd]

Seeing that the Don't Starve Alone mod is broken in this new beta, making it impossible to enter caves in any way, instead of making the mod work again, they should add it officially. I think it's the perfect time to add a vanilla local mode without the need for mods or opening a server.

And of course, I know the game can be "local", but only in worlds without caves. A button or indicator that tells you "this world is local" would also be excellent. I have a pretty bad PC, and if they added this in vanilla mode once and for all, it would be a miracle for me.