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

installer/PowerToysBootstrapper/bootstrapper/DotnetInstallation.h

@@ -0,0 +1,12 @@
+#pragma once
+
+#include <filesystem>
+#include <optional>
+
+namespace fs = std::filesystem;
+namespace updating
+{
+    bool dotnet_is_installed();
+    std::optional<fs::path> download_dotnet();
+    bool install_dotnet(fs::path dotnet_download_path, const bool silent);
+}