Derive Clone on Parent and Children

[atornity]

Objective

Parent and Children should be Cloneble.

Solution

Derive Clone on Parent and Children.

[MrGVSV]

Wouldn't this allow users to accidentally put these components into invalid states?

For example, cloning Parent and inserting it onto an entity that isn't one of its children.

[alice-i-cecile]

This enables UB via mem swap shenanigans breaking the invariants relied on during unsafe transform propagation. So we can't merge this.