Better AI Nodes and other fixes.

Working stairs added, as well as a bunch of other details.

Cubemaps and fixed door textures.

Added a NAV file for Nextbot navigation system.

Fixed a badly scaled wall.

Added wind entity, two doors, and lights in the secret room should buzz now.

Fixed a weird wall separation in the Backrooms Easter Egg that showed the void and added extra lights.

Made the trees outside untouchable with the Physics Gun. (Use the context menu with the C key if you want to get rid of them.)

Finally an update after two years! Fixed the ugly carpet texture, added a secret button that lets you go outside, and a new Easter Egg somewhere.

Initial addon creation.