[FEATURE-REQUEST] Any pointers on how to add select2

**Describe the problem you're proposing to solve**
Make the drop list more manageable where there are many list items.

**Describe the solution you'd like**
Add Javascript Select2 library instead of the regular drop list.

**Describe alternatives you've considered**
https://github.com/nico-amsterdam/phoenix_form_awesomplete

**Additional context**
Add any other context or screenshots about the feature request here.
https://select2.org/