Update AnimNode_KawaiiPhysics: Params when update skel comp move vector

[KunoSayo]

Thank you for the amazing plugin to make characters so cute.

When I was using this plugin in my game, I found that sometimes when the character stood on some moving platform (e.g., an elevator), the physics result might be hard to predict. I have tried to use UKawaiiPhysics_CustomExternalForce but I cannot get some vector.

I added SkeletalComponentMoveScale and SkeletalComponentFixedMoveOffset to adjust the standing platform physics.

Also write getters to get skeletal comp vector and rotation.

I tried to fix it in this commit. Thanks for your time reviewing this pull request.

[pafuhana1213]

Hi @KunoSayo ,

Thank you for your great PR!
I tried your PR and it made it much easier to adjust the physics when SkeletalMeshComponent moves.

I've merged your PR now. Thanks!