Add overload for Blazor vm.GetProperty for property path

[rockfordlhotka]

As per this thread: MarimerLLC/cslaforum#938

Consider adding an overload to the GetProperty method in ViewModel that accepts and expression similar to the For expression in a validation component. For example:

  var p = vm.GetProperty(() => vm.Model.Child.Name));

The idea is to allow creation of property info objects for the Model and children of the Model.

[rockfordlhotka]

The resolution of this is that I added an overload to GetPropertyInfo to take an expression, so it is possible to get info on any property.

  var info = vm.GetPropertyInfo(() => vm.Model.Child.Name);

[github-actions]

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