- added an empty level class and 3D assets for the grid background. the assets are temporary until i have time to make the mesh properly
- added a large grid in the background, Level class not used yet
- the camera and the spotlight both point at the player now! work in progress
- there are now 10 AI ships following you in a conga line!

- added simple "add ship" functionality to World. later, ship creation effects will trigger from here
- the Follow AI uses a set target instead of only following the player. now, the Follow AI can follow other AI