Notification actions/callbacks about fyne HOT 3 OPEN

I'm not sure it can be done with functions, though it would be nice if that was possible.
I think the lowest common denominator to notifications would be entering the app through a deep link... but this task needs real investigation to learn what is possible before we put an API on it.

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This is a great addition. However, do keep in mind that modifying the NewAnimation function when implementing this would be a breaking change. It would have to be part of the struct and maybe in a separate fyne.NewAnimationWithCallback function (or similar).

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I'd imagine something like this for the API side of that

myDeepLink := url.Url{} // url that should be used to call into the app when the notification is clicked
notification := fyne.NewNotificationWithDeepLink("Title", "Content", myDeepLink)

myapp.SetDeepLinkHandler(func(deepLink url.URL) {
    // match the URL to a rule and do anything / display anything as needed
})

With this scheme the developer gets to provide their own function for matching any deep link, which is very flexible

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