promptChoice prompt choices [default]

promptChoice prompts the user with prompt and choices and returns the user's response. choices must be a list of strings. If default is passed and the user's response is empty then it returns default.

!!! example

```
{{- $choices := list "desktop" "server" -}}
{{- $hosttype := promptChoice "What type of host are you on" $choices -}}
[data]
    hosttype = {{- $hosttype | quote -}}
```