Support for PrimeNG AutoComplete field property for object based suggestions

[vstiebe]

I'm submitting a

[ ] Bug / Regression
[x] Feature Request / Proposal

I'm using

NG Dynamic Forms Version: `12.0.0`

[ ] Basic UI
[ ] Bootstrap UI  
[ ] Foundation UI
[ ] Ionic UI
[ ] Kendo UI
[ ] Material  
[ ] NG Bootstrap
[x] Prime NG

Description

Support for PrimeNG AutoComplete field property for object based suggestions.
https://www.primefaces.org/primeng/showcase/#/autocomplete

Without this property only pure arrays can be used as suggestion source.
Probably one will need to override the onAutoComplete event handler to detect changes and adjust suggestions/list array.