Proposal: Introduce `filter` Attribute for `selectlist`

[sudheer-gowrigari]

The proposed filter attribute for selectlist aims to provide a more efficient, user-friendly way to navigate through long lists of options. This attribute would enable real-time filtering of options based on user input, making it especially useful in scenarios with large datasets.

Proposed Behavior

The 'filter' attribute would allow the selectlist to dynamically filter and display options that match the user's input. This would reduce the number of visible options, helping users to make selections more quickly and accurately.

This proposal also aids the development of the filter attribute for the combobox