Generate starter files

[BenSurgisonGDS]

See:

• Update the unit and integration tests to expect the kit to work as a package  #1530
• Simplify PR checks to only check running kit as a package #1521

This PR makes the kit a package only and all unit, integration and acceptence tests have been changed or removed to suit.

Please note that the templates in the cypress tests will be cut down in a future ticket to only contain the content and structure being tested.

[lfdebrux]

I think it might be helpful to have a changelog entry detailing all the user facing changes this PR makes, including things like assets no longer being copied to the public folder and which kit code is no longer in the userspace.

[nataliecarey]

In commit 21aefc0 (Generate starter files) we don't move the files from docs/views/templates to the prototype-starter folder, is this correct? Do we not want to include these templates with the prototype starter?

Yes, that's correct. I believe these should be in documentation rather than in the kit itself, after v13 we should expect not to make any changes in user space so any templates we provide in the starter kit will fall out of sync and get out of date.

I don't know if documentation is the right place for them but I know that providing them in the starter kit will lead us into problems that I'd rather avoid if we can.

[nataliecarey]

The changes to the project structure breaks our ability to deploy review apps automatically, is that an issue we want to fix, or shall we just turn off review apps for this repo?

If the review apps are useful to us it would be good to fix them but I think this can happen later.