Fixes #4046 - Moves examples into ./Examples and fixes ./Tests (#4047)

* touching publish.yml

* Moved Examples into ./Examples

* Moved Benchmarks into ./Tests

* Moved Benchmarks into ./Tests

* Moved UICatalog into ./Examples

* Moved UICatalog into ./Examples 2

* Moved tests into ./Tests

* Updated nuget

Examples/ReactiveExample/LoginViewModel.cs

@@ -0,0 +1,83 @@
+using System;
+using System.ComponentModel;
+using System.Reactive;
+using System.Reactive.Linq;
+using System.Runtime.Serialization;
+using System.Threading.Tasks;
+using ReactiveUI;
+using ReactiveUI.SourceGenerators;
+
+namespace ReactiveExample;
+
+//
+// This view model can be easily shared across different UI frameworks.
+// For example, if you have a WPF or XF app with view models written
+// this way, you can easily port your app to Terminal.Gui by implementing
+// the views with Terminal.Gui classes and ReactiveUI bindings.
+//
+// We mark the view model with the [DataContract] attributes and this
+// allows you to save the view model class to the disk, and then to read
+// the view model from the disk, making your app state persistent.
+// See also: https://www.reactiveui.net../docs/handbook/data-persistence/
+//
+[DataContract]
+public partial class LoginViewModel : ReactiveObject
+{
+    [IgnoreDataMember]
+    [ObservableAsProperty] private bool _isValid;
+
+    [IgnoreDataMember]
+    [ObservableAsProperty] private int _passwordLength;
+
+    [IgnoreDataMember]
+    [ObservableAsProperty] private int _usernameLength;
+
+    [DataMember]
+    [Reactive] private string _password = string.Empty;
+
+    [DataMember]
+    [Reactive] private string _username = string.Empty;
+
+    public LoginViewModel ()
+    {
+        IObservable<bool> canLogin = this.WhenAnyValue
+            (
+                x => x.Username,
+                x => x.Password,
+                (username, password) =>
+                    !string.IsNullOrEmpty (username) && !string.IsNullOrEmpty (password)
+            );
+
+        _isValidHelper = canLogin.ToProperty (this, x => x.IsValid);
+
+        Login = ReactiveCommand.CreateFromTask<HandledEventArgs>
+            (
+                e => Task.Delay (TimeSpan.FromSeconds (1)),
+                canLogin
+            );
+
+        _usernameLengthHelper = this
+                          .WhenAnyValue (x => x.Username)
+                          .Select (name => name.Length)
+                          .ToProperty (this, x => x.UsernameLength);
+
+        _passwordLengthHelper = this
+                          .WhenAnyValue (x => x.Password)
+                          .Select (password => password.Length)
+                          .ToProperty (this, x => x.PasswordLength);
+
+        ClearCommand.Subscribe (
+                         unit =>
+                         {
+                             Username = string.Empty;
+                             Password = string.Empty;
+                         }
+                        );
+    }
+
+    [ReactiveCommand]
+    public void Clear (HandledEventArgs args) { }
+
+    [IgnoreDataMember]
+    public ReactiveCommand<HandledEventArgs, Unit> Login { get; }
+}