Organize files into subdirectories

[aaronfranke]

I noticed that every single file used for this game is stored right next to project.godot in the project/ folder. A lack of organization does not scale well if you intend to make the game bigger.

Possible solutions include:

• Move terrain, heightmap, voxel, etc files to a "terrain" folder.

• Move character, player, avatar, mouse, etc files to a "player" folder.

[Zylann]

This is just a demo project, so I didn't consider organizing files at this point, I don't plan to add more stuff to it. Perhaps I could do it so people wanting to have a look have a better sense of how the project works, though.

[Zylann]

Now each demo has its own folder, and common files are in a common/ folder.

[TokisanGames]

Nice. It's much cleaner now. Can this issue be closed?