Move the workspace to a standalone component architecture

[rgoj]

This work is part of #822 - see that issue for an overview.

The Angular world has been quickly moving towards a module-less standalone component architecture. In #818 I run the basic migration. One of the benefits I've already seen in Maptio is faster compilation times due to more granularity.

There's still a way to go to complete the change, here's a stab at a working list:

• move the workspace to routing using lazy-loaded components
• remove the workspace module file

The changes in the workspace module should hopefully serve as a blueprint for changes in the rest of the app.