Central capability: Make it easy to easily add tabs to the Administer > Content submenu based on content moderation workflow states

Problem/Motivation

While configuring a workflow state, set whether it should have a tab, what the tab title should be, its weight for placing in the Content submenu, and what View it should go to.

Proposed resolution

Allegedly it is possible to configure a View with the right parent menu item and make a dummy menu item and do an incantation to do this solely with configuration, but the goal here is to provide code so that with very simple configuration it Just Works™

Remaining tasks

User interface changes

API changes

Data model changes