Autodetect Scopes for clasp run

[grant]

Expected Behavior

clasp run should autodetect scopes.

Actual Behavior

Scopes need to be specified.

Solution

• Try to run the function.
  • While the function fails because it needs a scope, prompt the user to enable the scope.
  • Otherwise, we're good.

Add the list of scopes to the manifest.

(From https://github.com/google/clasp/issues/204#issuecomment-440115707)

[grant]

Still a feature request.