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/common/notifications/BackgroundActivatorDLL/dllmain.cpp

@@ -0,0 +1,26 @@
+#include "pch.h"
+
+STDAPI DllRegisterServer()
+{
+    return S_OK;
+}
+
+STDAPI DllUnregisterServer()
+{
+    return S_OK;
+}
+
+BOOL APIENTRY DllMain(HMODULE,
+                      DWORD ul_reason_for_call,
+                      LPVOID)
+{
+    switch (ul_reason_for_call)
+    {
+    case DLL_PROCESS_ATTACH:
+    case DLL_THREAD_ATTACH:
+    case DLL_THREAD_DETACH:
+    case DLL_PROCESS_DETACH:
+        break;
+    }
+    return TRUE;
+}