Adds lots of stuff to Scene objects and adds Layout level staining support.

[universalconquistador]

• Adds Common::Math::SphereBounds, Common::Math::OrientedBounds, and Common::Math::AxisAlignedBounds math types. I did not update the few places that use Vector4 for sphere bounds instead of SphereBounds.

• Adds vfuncs for Scene object updates, computing the 3 types of bounds, hit testing, working with attach bones, and dither transparency. Also added an enum for the Dtor mode so we can standardize that a bit. Tested the 3 bounds querying (some cases are wonky e.g. characters with oriented and aligned bounds, but I believe that's a sqenix problem), both hit test methods, and dither transparency (SE only implemented it for BgObjects). Did not test the attach bone stuff.

• Adds the static Create helpers for BgObject and VfxObject, stain support for BgObject, and some VFX fields from OGT. Tested that I can create and destroy both, and set VFX color and BgObject stain.

• Adds support for staining SharedGroupLayoutInstances and in general via ILayoutInstance.ApplyStain. I have not tested these myself.

[universalconquistador]

Field overlap detected in Common::Math::SphereBounds with field Radius

yes thank you that's by design

[Haselnussbomber]

Just a quick glance at it.
It would also require you to add the functions and vfuncs to the data.yml once you're good with the names.

[universalconquistador]

Alright, light stuff added, feedback addressed and data.yml updated!