docs(aio): add missing dependencies and files to testing zip download

[brandonroberts]

Closes #23060

PR Checklist

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• The commit message follows our guidelines: https://github.com/angular/angular/blob/master/CONTRIBUTING.md#commit
• Tests for the changes have been added (for bug fixes / features)
• Docs have been added / updated (for bug fixes / features)

PR Type

What kind of change does this PR introduce?

[ ] Bugfix
[ ] Feature
[ ] Code style update (formatting, local variables)
[ ] Refactoring (no functional changes, no api changes)
[ ] Build related changes
[ ] CI related changes
[x] Documentation content changes
[ ] angular.io application / infrastructure changes
[ ] Other... Please describe:

What is the current behavior?

Issue Number: N/A

What is the new behavior?

Does this PR introduce a breaking change?

[ ] Yes
[x] No

Other information

[mary-poppins]

You can preview 47909b1 at https://pr23948-47909b1.ngbuilds.io/.

[gkalpak]

LGTM for the zips.
(The stackblitz projects seem to be broken, but that could be fixed in another PR.)

[gkalpak]

BTW, the live examples seem to be broken because StackBlitz doesn't know where to look for app/** stuff required in test.sb.ts. Maybe changing from 'app/...' to from './app/...' would fix it.

[brandonroberts]

@gkalpak yea, that fixes it but it works on the V5 examples using app/...

V5 - https://stackblitz.com/angular/ovyxpbjxapo
V6 - https://stackblitz.com/angular/lnajarexvlk

cc: @EricSimons

[gkalpak]

This is because in v5 we have {"apps": [{"root": "src", ...}], ...} in .angular-cli.json. In v6's angular.json we have "root": "" and StackBlitz doesn't handle src/ as a root for the project (as webpack seems to always do).

[brandonroberts]

Yes, we had this same issue with the live example for the router also not recognizing app/... and the StackBlitz team fixed the issue on their end.

[brandonroberts]

I opened a separate issue about the StackBlitz zip files as they are broken for V5 and V6. #23962

[EricSimons]

Yeah, what @gkalpak pointed out is the cause of this issue. Unf this one will be a bit harder for us to immediately fix on our end, although we do have some new upgrades we're working on for our bundler/loader that are coming in 2-4wks that will make it possible. In the meantime, swapping the imports to be relative does fix this problem- here's a fork I made: https://stackblitz.com/edit/angular-nfcbbm?file=src/tests.sb.ts

[brandonroberts]

Ok. I'll change the paths to be relative.

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[mary-poppins]

You can preview a3731cd at https://pr23948-a3731cd.ngbuilds.io/.

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