[KeyboardManager WinUI3] Create WinUI3 project and wrapper for Keyboard Manager Editor (#37427)

* Set up KBM WinUI3 Editor UI project

* Test invoking the KBM library via wrapper for WinUI3 C# UI

* Set up Editor Library Wrapper and enable logging

* fix spelling

* update spacing and remove unused file

* fix formatting

* update sln

* update wrapper project config

* import common props

* update UI reference

* gate the new editor with the experimentation toggle in settings

src/modules/keyboardmanager/KeyboardManagerEditorUI/MainWindow.xaml

@@ -0,0 +1,18 @@
+<?xml version="1.0" encoding="utf-8" ?>
+<Window
+    x:Class="KeyboardManagerEditorUI.MainWindow"
+    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
+    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+    xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
+    xmlns:local="using:KeyboardManagerEditorUI"
+    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
+    Title="KeyboardManagerEditorUI"
+    mc:Ignorable="d">
+
+    <StackPanel
+        HorizontalAlignment="Center"
+        VerticalAlignment="Center"
+        Orientation="Horizontal">
+        <Button x:Name="myButton" Click="MyButton_Click">Click Me</Button>
+    </StackPanel>
+</Window>