[AlwaysOnTop] Proof of concept (#14360)

Co-authored-by: Niels Laute <niels.laute@live.nl>

src/modules/alwaysontop/AlwaysOnTopModuleInterface/pch.h

@@ -0,0 +1,17 @@
+#pragma once
+
+#define WIN32_LEAN_AND_MEAN // Exclude rarely-used stuff from Windows headers
+#include <Unknwn.h>
+#include <winrt/base.h>
+#include <winrt/Windows.Foundation.h>
+#include <winrt/Windows.Foundation.Collections.h>
+#include <ProjectTelemetry.h>
+#include <TraceLoggingActivity.h>
+#include <wil\common.h>
+#include <wil\result.h>
+
+
+namespace winrt
+{
+    using namespace ::winrt;
+}