Moved CanvasState out of canvasrenderingcontext

Cleaned up imports...

Applied clang-tidy

Moved CanvasState  and some other files

Next commit should remove pub modifier from members of CanvasState and use getters/setters instead.

Members of CanvasState are now private and applied test-tidy

Now have getters that return an immutable reference.
Also, I have no idea what to name some_func.rs

Removed need for some_func and made pub(crate)

components/script/lib.rs

@@ -55,6 +55,7 @@ mod devtools;
 pub mod document_loader;
 #[macro_use]
 mod dom;
+mod canvas_state;
 mod compartments;
 pub mod fetch;
 mod image_listener;