Dropdown: Add description (sublabel)

[jeslag]

Does the component already exist

• [X] I confirm that I have checked if the component already exists in any of the Green libraries

For which framework/library you are requesting the component

Angular

Description

Add possibility to provide a description/label information to the dropdown as shown in the example below:

Who will benefit from this feature?

Accessibility

Anything else?

No response

[EldRoos]

Similar issue: #1048