Added CLI command for API docs.

[bre1470]

Use npx connectors-morningstar api.

[Eskils]

This is a big PR, so I spent more time testing rather that looking though code.

This is great because it looks and works like the rest of the Highcharts API Reference, and also works offline.

Requested changes:

Some things on the API docs website at localhost:8005 did not work like I expected:

• Navigating directly to an option (e.g. http://localhost:8005/RNANews.localization.currency) does not work. The home page is shown instead. This also means the links in the div#body does not work.

• The class reference does not exist.

  • If this is not to be implemented: Consider hiding this link.
  • If it is to be kept: consider a different text. It now reads For modifying the chart at runtime. See the [class reference](http://localhost:8005/class-reference/classes.list).

• Missing copyright year and version in footer

• The search field does not work. Console shows 404 search.json

• Clicking “JS API Reference” in the top header links to the incorrect page which does not exist:

• Edit button on the options link to the wrong page on GitHub: https://github.com/highcharts/highcharts/blob/vundefined/src/RNANews/RNANewsOptions.ts

• GitHub logo/link in the footer links to Highcharts repository. I expected it to link to the connectors-morningstar repository.

[Eskils]

This is excellent – well done!