Save Pose

[Lawrencemm]

As a developer, I want to save a pose, so I can reuse poses for multiple transform hierarchies.

Transform Hierarchy: The tree of entities with the Transform Parent component that share the same common ancestor.
Pose: A set with a transform for each entity in a transform hierarchy

Provide:
Action to save selected entity's transform hierarchy's pose to a .lmpose file
Action to load a .lmpose file into the selected entity

Transform hierarchy should be checked to match the structure of the loaded pose.