[Launcher] Use a keyboard hook in the runner to invoke the Launcher (#6660)

* Added a keyboard hook to the runner

* Update RootKeyboardHook

* Enable reading the whole JsonObject property

* Renamed RootKeyboardHook to CentralizedKeyboardHook

* Fixed build break, changed callback return type to bool

* Added Hotkey struct which somehow went missing

+ Cherry-pick fixes

* Reorganized the kb hook

* Basic version works

* Various fixes

* Finishing touches

* Fix potential threading issue

* int -> size_t

* Add default initializers to the Hotkey struct

* Added a suggested comment

* Unified a constant

* Use C# classes instead of native calls for sync

* Added a claryfing comment

* Use std::move

* Renamed a method

* Possible fix for compilation errors

* Fix a regression

* Show a message on failure

* Added DISABLE_LOWLEVEL_HOOK support

* Allow running Launcher as standalone

* Rename string constants

src/modules/launcher/PowerLauncher/App.xaml.cs

@@ -4,6 +4,7 @@
 
 using System;
 using System.Diagnostics;
+using System.Linq;
 using System.Windows;
 using ManagedCommon;
 using Microsoft.PowerLauncher.Telemetry;
@@ -30,7 +31,6 @@ namespace PowerLauncher
 
         private const string Unique = "PowerLauncher_Unique_Application_Mutex";
         private static bool _disposed;
-        private static int _powerToysPid;
         private Settings _settings;
         private MainViewModel _mainVM;
         private MainWindow _mainWindow;
@@ -40,15 +40,10 @@ namespace PowerLauncher
         private SettingsWatcher _settingsWatcher;
 
         [STAThread]
-        public static void Main(string[] args)
+        public static void Main()
         {
             if (SingleInstance<App>.InitializeAsFirstInstance(Unique))
             {
-                if (args?.Length > 0)
-                {
-                    _ = int.TryParse(args[0], out _powerToysPid);
-                }
-
                 using (var application = new App())
                 {
                     application.InitializeComponent();
@@ -59,17 +54,29 @@ namespace PowerLauncher
 
         private void OnStartup(object sender, StartupEventArgs e)
         {
-            RunnerHelper.WaitForPowerToysRunner(_powerToysPid, () =>
+            for (int i = 0; i + 1 < e.Args.Length; i++)
             {
-                try
+                if (e.Args[i] == "-powerToysPid")
                 {
-                    Dispose();
+                    int powerToysPid;
+                    if (int.TryParse(e.Args[i + 1], out powerToysPid))
+                    {
+                        RunnerHelper.WaitForPowerToysRunner(powerToysPid, () =>
+                        {
+                            try
+                            {
+                                Dispose();
+                            }
+                            finally
+                            {
+                                Environment.Exit(0);
+                            }
+                        });
+                    }
+
+                    break;
                 }
-                finally
-                {
-                    Environment.Exit(0);
-                }
-            });
+            }
 
             var bootTime = new System.Diagnostics.Stopwatch();
             bootTime.Start();
@@ -85,6 +92,7 @@ namespace PowerLauncher
 
                 _settingsVM = new SettingWindowViewModel();
                 _settings = _settingsVM.Settings;
+                _settings.UsePowerToysRunnerKeyboardHook = e.Args.Contains("--centralized-kb-hook");
 
                 _alphabet.Initialize(_settings);
                 _stringMatcher = new StringMatcher(_alphabet);