common: refactor common library pt2 (#8588)

- remove common lib
- split settings, remove common-md
- move ipc interop/kb_layout to interop
- rename core -> settings, settings -> old_settings
- os-detect header-only; interop -> PowerToysInterop
- split notifications, move single-use headers where they're used
- winstore lib
- rename com utils
- rename Updating and Telemetry projects
- rename core -> settings-ui and remove examples folder
- rename settings-ui folder + consisent common/version include

src/settings-ui/Microsoft.PowerToys.Settings.UI/Views/ShellPage.xaml.cs

@@ -0,0 +1,133 @@
+// Copyright (c) Microsoft Corporation
+// The Microsoft Corporation licenses this file to you under the MIT license.
+// See the LICENSE file in the project root for more information.
+
+using System;
+using System.Collections.Generic;
+using Microsoft.PowerToys.Settings.UI.Library;
+using Microsoft.PowerToys.Settings.UI.ViewModels;
+using Windows.Data.Json;
+using Windows.UI.Xaml.Controls;
+
+namespace Microsoft.PowerToys.Settings.UI.Views
+{
+    /// <summary>
+    /// Root page.
+    /// </summary>
+    public sealed partial class ShellPage : UserControl
+    {
+        /// <summary>
+        /// Declaration for the ipc callback function.
+        /// </summary>
+        /// <param name="msg">message.</param>
+        public delegate void IPCMessageCallback(string msg);
+
+        /// <summary>
+        /// Gets or sets a shell handler to be used to update contents of the shell dynamically from page within the frame.
+        /// </summary>
+        public static ShellPage ShellHandler { get; set; }
+
+        /// <summary>
+        /// Gets or sets iPC default callback function.
+        /// </summary>
+        public static IPCMessageCallback DefaultSndMSGCallback { get; set; }
+
+        /// <summary>
+        /// Gets or sets iPC callback function for restart as admin.
+        /// </summary>
+        public static IPCMessageCallback SndRestartAsAdminMsgCallback { get; set; }
+
+        /// <summary>
+        /// Gets or sets iPC callback function for checking updates.
+        /// </summary>
+        public static IPCMessageCallback CheckForUpdatesMsgCallback { get; set; }
+
+        /// <summary>
+        /// Gets view model.
+        /// </summary>
+        public ShellViewModel ViewModel { get; } = new ShellViewModel();
+
+        /// <summary>
+        /// Gets a collection of functions that handle IPC responses.
+        /// </summary>
+        public List<System.Action<JsonObject>> IPCResponseHandleList { get; } = new List<System.Action<JsonObject>>();
+
+        public static bool IsElevated { get; set; }
+
+        public static bool IsUserAnAdmin { get; set; }
+
+        /// <summary>
+        /// Initializes a new instance of the <see cref="ShellPage"/> class.
+        /// Shell page constructor.
+        /// </summary>
+        public ShellPage()
+        {
+            InitializeComponent();
+
+            DataContext = ViewModel;
+            ShellHandler = this;
+            ViewModel.Initialize(shellFrame, navigationView, KeyboardAccelerators);
+            shellFrame.Navigate(typeof(GeneralPage));
+        }
+
+        public static int SendDefaultIPCMessage(string msg)
+        {
+            DefaultSndMSGCallback(msg);
+            return 0;
+        }
+
+        public static int SendCheckForUpdatesIPCMessage(string msg)
+        {
+            CheckForUpdatesMsgCallback(msg);
+            return 0;
+        }
+
+        public static int SendRestartAdminIPCMessage(string msg)
+        {
+            SndRestartAsAdminMsgCallback(msg);
+            return 0;
+        }
+
+        /// <summary>
+        /// Set Default IPC Message callback function.
+        /// </summary>
+        /// <param name="implementation">delegate function implementation.</param>
+        public static void SetDefaultSndMessageCallback(IPCMessageCallback implementation)
+        {
+            DefaultSndMSGCallback = implementation;
+        }
+
+        /// <summary>
+        /// Set restart as admin IPC callback function.
+        /// </summary>
+        /// <param name="implementation">delegate function implementation.</param>
+        public static void SetRestartAdminSndMessageCallback(IPCMessageCallback implementation)
+        {
+            SndRestartAsAdminMsgCallback = implementation;
+        }
+
+        /// <summary>
+        /// Set check for updates IPC callback function.
+        /// </summary>
+        /// <param name="implementation">delegate function implementation.</param>
+        public static void SetCheckForUpdatesMessageCallback(IPCMessageCallback implementation)
+        {
+            CheckForUpdatesMsgCallback = implementation;
+        }
+
+        public static void SetElevationStatus(bool isElevated)
+        {
+            IsElevated = isElevated;
+        }
+
+        public static void SetIsUserAnAdmin(bool isAdmin)
+        {
+            IsUserAnAdmin = isAdmin;
+        }
+
+        public void Refresh()
+        {
+            shellFrame.Navigate(typeof(GeneralPage));
+        }
+    }
+}