[ISSUE][DOCS] Animation editor catalog out of order

[HydrogenC]

Describe the issue

The catalog of Visualization - Animation - Animation editor is ordered by alphabet, but it shouldn't have been.

Impacted page(s)

https://www.docs.o3de.org/docs/user-guide/visualization/animation/animation-editor/

Expected experience

The pages in the catalog should be listed in logic order and a proper hierarchy. For example, by logic, Getting Started with the Animation Editor should have came first, and the Blend xx Nodes pages should be under Blending Poses with Blend Nodes in the catalog.