Update documentation to reflect standalone component usage from v18.0.0

[kovax]

I'm submitting a

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

I'm using

NG Dynamic Forms Version: 18.0.0

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

Description

Documentation should show, that importing modules e.g. DynamicFormsPrimeNGUIModule will not work anymore, users need to import components individually.

[kovax]

@udos86 please correct me if I am wrong, but the only difference is that DynamicPrimeNGFormComponent is imported instead of DynamicFormsPrimeNGUIModule in case of PrimeNG.