GOAL
Customer should be able to create subfolders to group ACM policies for better organization and management - Create subfolders to group policies (include built-in tagging, custom tagging, distinguish policies deployed by Gitops and UI/CLI, by policy engine).

BACKGROUND
This feature would be powerful when a number of policies are in place. Currently there is no way to organize policies as they are added upon creation.

DESIGN

• Policy set page design spec: https://github.com/open-cluster-management/backlog/issues/17710 
• Prototype: https://marvelapp.com/prototype/156hg244/screen/80749583
• Doc: https://docs.google.com/document/d/1j_UKCC-DcRwMeabdtj-JLvohCf89-rwNohP5PLy4PmA/