Convert Vector3s to Quaternions

[sr229]

Prior to discussion on Discord, we believe there are many benefits for using Quaternions - hence we'll be using Quaternions to represent it's values in the library.

The main objectives are the following:

• Accept standard Vector3 output from MediaPipe (should be no behavioral changes)
• Create a helper that changes these Vector3s into Quaternions
• Structs and Classes should use Quaternions as much as possible as we already convert them internally in-Moetion.