Missing registrations

[coreh]

Objective

During my exploratory work on the remote editor, I found a couple of types that were either not registered, or that were missing ReflectDefault.

Solution

• Added registration and ReflectDefault where applicable
• (Drive by fix) Moved Option<f32> registration to bevy_core instead of bevy_ui, along with similar types.

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Changelog

• Fixed: Registered FogSettings, FogFalloff, ParallaxMappingMethod, OpaqueRendererMethod structs for reflection
• Fixed: Registered ReflectDefault trait for ColorGrading and CascadeShadowConfig structs

[MrGVSV]

Non-blocking: While we're here, we could also consider registering the ReflectSerialize and ReflectDeserialize for all of these Option types.

[MrGVSV]

Also, it seems like the GetTypeRegistration impl for Option<T> doesn't register ReflectDefault when it definitely could. If you want, you could add that as well. But definitely not necessary for the sake of this PR.

[MrGVSV]

Non-blocking: Should we also register other Option primitives? Like Option<usize>, etc.?

[james7132]

Curious if we should default to automatically registering the Option<T> for all T: Reflect that are already registered.

I wonder if this would be avoidable via #4154 so that we avoid needing to manually registering these individually.

[MrGVSV]

Curious if we should default to automatically registering the Option<T> for all T: Reflect that are already registered.

I wonder if this would be avoidable via #4154 so that we avoid needing to manually registering these individually.

Yeah I think it'd be fine to do this for Option considering how ubiquitous it is. Recursive registration should definitely help though.