[FEATURE] Add more autocomplete examples as in BI doc

[dej611]

Describe the solution you'd like Extend the Autocomplete examples set based on the original Bootstrap Italia documentation: https://italia.github.io/bootstrap-italia/docs/form/input/#input-con-risultato-ricerca-o-autocompletamento

• Add more stories matching the BI doc
  • [ ] Async example
  • [ ] Custom styling for the option list
  • [ ] Custom styling for the "bigger" version

Notes:

• use BI classes to style the component.
• minimize the amount of extra CSS to style in this component ( possibly creating a set of reusable react-select styles objects reusable
• Given the extra dditional styling, consider to create a wrapper?
  • In this case it would help to provide also a guide for the dev to create his custom autocomplete component is case limiteed by the wrapper