presently, the can_manage_api privilege grants access to all API namespaces. We want to add a feature such that,
to accomplish this we will introduce 2 checkboxes at the top level (only one of them selectable):
When "Allow access to API Namespaces by category" is selected it should show the categories for selection
@alis-khadka @Pralish who wants to pick up this task? Note that the frontend work can be delegated to @westernal at your discretion
