Thread-local components that can only be used in thread local systems

Currently it is not possible to create a component that does not implement `Send` and `Sync`. When working with renderers in for example OpenGL this starts to become a problem where OpenGL objects such as vbo's, vao's, etc. which cannot be shared across threads can't be safely made into components.

A new, secondary, component trait that does not require `Send` and `Sync` to be implemented and can only be used in thread-local systems would allow for these OpenGL object to be expressed as components which will (in my opinion) improve the way a renderer can be designed using the Legion ECS.