Support to lookup Angular built-in directives about vscode-dash

[deerawan]

@michaeljota I see, seems like we haven't added angular docset there in default settings.

If you already updated the plugin to 2.0.0, you can add angular into html field in settings:

"dash.languageIdToDocsetMap": {
  ...,
  "html": [
     ....,
    "angular" // add new dash docset key here
  ]
  ...
}

[michaeljota]

Still, it would look to the tag, wouldn't it? It should look for a class instead.

[deerawan]

@michaeljota I'm afraid that we can't do that to match html tag <router-outlet> into angular class RouterOutlet in Dash.