Clean up demo

[donmccurdy]

The current demo is probably more complex than it needs to be. I'd like to get the thing building with Vite, and have two separate demo —

1. basic demo that looks nice and is as simple as possible
2. drag-and-drop demo that lets you bring in a .glb for testing

[soelen]

If you would like to / if help is needed I could help out :)

[donmccurdy]

@soelen if you're willing to do that, yes much appreciated! I just pushed a commit (https://github.com/donmccurdy/three-pathfinding/commit/5710b1de125374137084417e7e05d9922b30d2da) that updates the builds to Vite. Ideally I'd like to do something like this setup...

https://github.com/donmccurdy/three-filmic/blob/main/examples/vite.config.js

... if we want to support more than one demo page.

[soelen]

https://github.com/donmccurdy/three-pathfinding/pull/185