UI Setup Flow

diff from last devlog to this one

I added a setup flow to the main UI page, and did a lot of refactoring.

I also removed support for setting up the game via browser console. I didn’t make this choice lightly because it was a fun feature, but the tradeoffs were just too much and I decided that it wasn’t worth it, especially because the console setup is much clunkier than just using the HTML form, so I doubt anyone would even use it.

But anyways, the main focus of this devlog is the setup flow on the main UI page (aka the play page). I also added some pretty sleek animations when activating and deactivating the game overlay.