New UI in the admin section to support mapping creation/deletion functionality

MR: Pending

Description

This is a feature scoped to organizations, but in a non-cells world that is equivalent to instance level (all namespaces exist under the default organization). We would need to roll out a workspace submenu under the admin area in keeping with the "instance-level" feel.

This UI would be dependent on the graphql API for querying org-agents and creating/deleting mappings being ready↵

We can look to the existing group UI for inspiration.

Acceptance Criteria

• UI in the admin area that allows enabling of an agent