DS Epic: Combo Selector

### **Description**

A Combo Selector component combines a dropdown menu with an input field, allowing users to either select an option from a predefined list or enter a custom value. It offers flexibility and efficiency in choosing or specifying data, enhancing user interaction and input accuracy.

No files, tests, or entry points are named. Start by reviewing the design system's existing selector and input components, then define the component's expected behavior for predefined options and custom values. Done means a documented Combo Selector component supports both selection modes.

Written by the indexing model from the issue text.