The tween animation uses the tweening library to smoothly move the
camera across the board. Also added a smoothing for any large jumps in
the position of the camera.
Moved the assets to public, as assets is the directory that vite preview
serves it's files from and that confuses vite. Using public is just
easier. Updated all the needed links.
The gamestate object is now where most of the "state" of both the map
and the board live. The units load, just working on loading the colors
of the map ownership again.
