Renaming of ccm::Object

[JarrettSJohnson]

Should be more specific to something. I don't have a extremely clear design of what kind of information should be in this class, but for now it'll probably just be items related to its rendering. Name is a placeholder for now.

Other suggestions brought up by Gaztin:
Renderable
Drawable

[Jack-Punter]

This may be overcomplicating it but... what about Renderable which can have an std::variant member that is one of a few different things we may want to render? i.e a texture, a plain square (like object currently is) or some text (which would include font info and such), for example.