AutoComplete: Multiple & !forceSelection

Describe the feature you would like to see added

Allow the Autocomplete with multiple selection to allow for custom items.
forceSelection is off by default, but doesn't apply if multiple is set to true.

Is your feature request related to a problem?

No response

Describe the solution you'd like

Maybe an option to the bottom of the list for "Add custom option " which upon clicking it, adds what the user has typed as a chip to the autocomplete.

Describe alternatives you have considered

No response

Additional context

I don't think we'd even need to verify if what the user has input is in the options list or not to show the add custom option as it's possible they want to add some text that is part of an option, but not the actual option.

Here is a simple example

Start at the AutoComplete component entry point and trace how multiple selection and forceSelection handle typed values. Review the linked custom-selections example, then define the add-custom-option interaction and verify that submitted text becomes a chip without disrupting existing option selection.