CLI: Generate docs:json command dynamically for Angular project

[gaetanmaisse]

Issue: #11609

What I did

• Angular CLI 10 introduced a tsconfig.base.json file that we have to use to generate doc with compodoc. So if tsconfig.base.json exists then use it, otherwise assume there is a tsconfig.json file.
• Update E2E test of addon-viewport to match the latest example stories

How to test

• I checked locally that generated docs:json commands are OK.
• CI should be 🟢
• In the CI logs we should have valid logs displaying compodoc output:

[19:53:11] found          : ButtonComponent
[19:53:11] parsing        : /tmp/storybook-e2e-testing/angular-vv8-lts/src/stories/header.component.ts
[19:53:11] found          : HeaderComponent
[19:53:11] parsing        : /tmp/storybook-e2e-testing/angular-vv8-lts/src/stories/page.component.ts
[19:53:11] found          : PageComponent

[gaetanmaisse]

ci/circleci: examples-v2 is failing because the following frameworks haven't the new story templates yet:

• rax
• riot
• html

Everything else is 🆗

[shilman]

Thanks @gaetanmaisse 🙏

[shilman]

Can we remove the e2e for rax, riot, html until they are passing?