Feature Request: Add a `MultiSelectDropdown` component

[andrii-bodnar]

The current Dropdown component only allows for a single selection. To build more powerful and flexible plugins, we need a way to let users select multiple options.

I propose adding a new, separate component, MultiSelectDropdown, with the following features:

• Multi-value support: The value prop would accept an array of strings (string[]), and the onChange handler would return an array of all selected values.
• Clear user interface: Visually display selected items in the input field, perhaps using "tags" or "pills."
• Familiar API: The component should be easy to use and consistent with the existing Dropdown component's API.

Creating a new component would keep the existing Dropdown lightweight for single-select use cases while providing a robust solution for multi-select needs like filtering or tagging.

References:

• Dropdown component