Add reflect impls to IRect and URect

[RCoder01]

Objective

This attempts to make the new IRect and URect structs in bevy_math more similar to the existing Rect struct.

Solution

Add reflect implementations for IRect and URect, since one already exists for Rect.

[MrGVSV]

Both of these types should also add Hash to this list, since they implement Hash (unlike Rect).

[RCoder01]

Should Hash be put behind a #[cfg_attr(not(target_arch = "spirv"), derive(Hash))] attribute since IVec2/UVec2 have that cfg?

I just added the Hash derive but without the cfg flag because IVec2/UVec2's Debug implementation is also #[cfg_attr(not(target_arch = "spirv")], yet Debug is still derived directly on IRect/URect.

I also added Eq derives for convenience, but I couldn't add Eq to the reflect derive since the compiler complained about ReflectEq, which I couldn't find. Does there exist an Eq reflect trait?

[MrGVSV]

I see. Yeah I would try to match the same flags that the source code defines. Actually, I don't think it's necessary right? As long as the rect types are fine I think it should be fine too. I could be wrong though.

And no, there is no ReflectEq. Eq is not treated specially by the macro either (unlike PartialEq, Debug, and Hash).

[RCoder01]

My guess is that bevy would just fail to compile for the spirv target architecture, since the Hash and Debug derive macro requirements wouldn't be satisfied. But bevy would probably already fail to compile on this arch for many other reasons, so I don't see this as a problem.