Restructure graphics repository

[kaetemi]

The current structure of something/something/ecosystem/etc is difficult to navigate, and does not really clarify where everything belongs in terms of interdependencies. It would be more practical if the repository is organized similarly to the build pipeline workspaces. Separating into ecosystems, continents, and common assets first. This would also facilitate putting the pipeline configurations in the same tree as the graphics repository, and make it easier to create new ecosystems and continents, as the structure of the assets for each will be immediately obvious.

[kaetemi]

Cons: A large amount of max assets contain absolute paths, and will have to be modified to work correctly, again. This would hurt our LFS quota a lot.