Rotation and Linux Build!

Alright, we've got a linux build up now using an AppImage, should work on a ton of platforms as it's built using linuxdeployqt on the oldest platform it supports. Test it out and let me know if it has any problems, I've never built a distributable this way before so it's a learning experience fo sho!

In other news, I made some changes to how I render the entities so I can rotate them around so you can see that now in the UI and in the entity list on the left you can see the selected entities rotation values. The main one is of course the Y axis, as that's vertical in the game, only some types of entities ever have any X or Z rotation, think trees, special stones, stumps, etc.

And I've adjusted some of how I produce and upload builds so it if you use the itch client and let it update the tool it should work a bit better, I was getting odd crashes on startup on macOS but I think those should go away now.