Add LongPress event

[criss02-cs]

hi everyone, I was developing my app with .NET MAUI and I noticed something, the possibility of managing the event of long pressure on a button, or in any other control, is missing, I solved it by creating a custom button that implements this functionality however I believe it should be included as a basic functionality since it is used a lot nowadays

[dartasen]

You can now also use https://learn.microsoft.com/en-us/dotnet/communitytoolkit/maui/behaviors/touch-behavior?tabs=toucheffect-xaml%2Ctouchbehavior-xaml#handling-long-press-interaction as another solution