ci: test cases for `@daffodil/commerce` that validate generated app

[griest024]

Feature description

We need e2e test cases that validate that the app generated by @daffodil/commerce runs and behaves as expected.

Use case

As a daffodil maintainer, I would like to know if my change will break the commerce schematics.

Prior work

No response

Daffodil version

0.90

Additional context

Essentially there needs to be an automated script that can run in CI that:

1. scaffolds out an angular app (ng new)
2. run the ecommerce schematic (ng add @daffodil/ecommerce)
3. builds the resulting app
4. determines whether or not that build was successful (do we try to serve the app and run some e2e tests?)

[griest024]

@joannalauu the real tricky part is determining the sparse matrix of ng new and ng add that covers the maximum amount of code paths possible.

Performance will be a big consideration. In large part, the time spent in CI will be setup, e.g. npm install. A possible solution is instead of running a new CI job for every test case, instead scaffold out the angular app and npm install in a single job and then use git to reset to this point after running each ecommerce test case.