Internal issue 2856 - IC Select to support free input naturally

This is a commonly used feature within our project and is a part of MUI autocomplete, a component that IC Select naturally would be placed to replace. [https://mui.com/material-ui/react-autocomplete/#free-solo|https://mui.com/material-ui/react-autocomplete/#free-solo] This is the docs for MUI’s implementation

Start with the MUI Autocomplete free-solo documentation linked in the issue, then locate IC Select in this repository and compare its current interaction model. Define the expected free-input behavior and verify that IC Select supports it consistently; the issue does not name implementation files or tests.

Written by the indexing model from the issue text.