I wrote down my understanding of the best ways to build/run/test/debug this repository.
A couple other random things included here:
* Removed an extraneous `debugger;` statement which I kept hitting.
* Removed the `watch` scripts which are no longer used and don't need to be supported.
* Removed `yarn test-cli-e2e`, as it alters the $PATH and can use the wrong `ng` instance.
