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/UICatalog/Scenarios/RunTExample.cs

@@ -0,0 +1,84 @@
+using Terminal.Gui;
+
+namespace UICatalog.Scenarios;
+
+[ScenarioMetadata ("Run<T> Example", "Illustrates using Application.Run<T> to run a custom class")]
+[ScenarioCategory ("Runnable")]
+public class RunTExample : Scenario
+{
+    public override void Main ()
+    {
+        // No need to call Init if Application.Run<T> is used
+        Application.Run<ExampleWindow> ().Dispose ();
+        Application.Shutdown ();
+    }
+
+    public class ExampleWindow : Window
+    {
+        private readonly TextField _usernameText;
+
+        public ExampleWindow ()
+        {
+            Title = $"Example App ({Application.QuitKey} to quit)";
+
+            // Create input components and labels
+            var usernameLabel = new Label { Text = "Username:" };
+
+            _usernameText = new()
+            {
+                // Position text field adjacent to the label
+                X = Pos.Right (usernameLabel) + 1,
+
+                // Fill remaining horizontal space
+                Width = Dim.Fill ()
+            };
+
+            var passwordLabel = new Label
+            {
+                Text = "Password:", X = Pos.Left (usernameLabel), Y = Pos.Bottom (usernameLabel) + 1
+            };
+
+            var passwordText = new TextField
+            {
+                Secret = true,
+
+                // align with the text box above
+                X = Pos.Left (_usernameText),
+                Y = Pos.Top (passwordLabel),
+                Width = Dim.Fill ()
+            };
+
+            // Create login button
+            var btnLogin = new Button
+            {
+                Text = "Login",
+                Y = Pos.Bottom (passwordLabel) + 1,
+
+                // center the login button horizontally
+                X = Pos.Center (),
+                IsDefault = true
+            };
+
+            // When login button is clicked display a message popup
+            btnLogin.Accepting += (s, e) =>
+                               {
+                                   if (_usernameText.Text == "admin" && passwordText.Text == "password")
+                                   {
+                                       MessageBox.Query ("Login Successful", $"Username: {_usernameText.Text}", "Ok");
+                                       Application.RequestStop ();
+                                   }
+                                   else
+                                   {
+                                       MessageBox.ErrorQuery (
+                                                              "Error Logging In",
+                                                              "Incorrect username or password (hint: admin/password)",
+                                                              "Ok"
+                                                             );
+                                   }
+                               };
+
+            // Add the views to the Window
+            Add (usernameLabel, _usernameText, passwordLabel, passwordText, btnLogin);
+        }
+    }
+}