Dev/yuyoyuppe/autoupdate polishing (#11693)

* [Updating] Create a dedicated executable project for updating procedures

* [Updating] Use PowerToys.Update for update procedures (#11495)

* [Updating] Use PowerToys.Update for update procedures

* [Setup] Remove toast notifications and other dependencies from bootstrapper

* [Installer] Remove Winstore, redundant strings

* [Settings] Remove deprecated 'packaged' setting

src/runner/UpdateUtils.h

@@ -0,0 +1,22 @@
+#pragma once
+
+#include <common/updating/updating.h>
+
+void PeriodicUpdateWorker();
+void CheckForUpdatesCallback();
+
+namespace cmdArg
+{
+    // Starts first stage of the PowerToys auto-update process, which involves copying action runner to a temp path and
+    // restarting it from there, so it doesn't interfere with the installation process.
+    const inline wchar_t* UPDATE_NOW_LAUNCH_STAGE1 = L"-update_now";
+    // Stage 2 consists of starting the installer and optionally launching newly installed PowerToys binary.
+    // That's indicated by the following 2 flags.
+    const inline wchar_t* UPDATE_NOW_LAUNCH_STAGE2 = L"-update_now_stage_2";
+    const inline wchar_t* UPDATE_STAGE2_RESTART_PT = L"restart";
+    const inline wchar_t* UPDATE_STAGE2_DONT_START_PT = L"dont_start";
+
+    const inline wchar_t* UPDATE_REPORT_SUCCESS = L"-report_update_success";
+}
+
+SHELLEXECUTEINFOW LaunchPowerToysUpdate(const wchar_t* cmdline);