[idd] project: organize driver sources by responsibility

Group the IDD sources and Visual Studio filters by subsystem.

Split the device and swap-chain implementations into focused units,
rename the context classes, and reduce header coupling.

idd/LGIdd/Driver.cpp

@@ -22,9 +22,9 @@
 #include "driver.tmh"
 
 #include "CDebug.h"
-#include "CPlatformInfo.h"
+#include "platform/CPlatformInfo.h"
 #include "VersionInfo.h"
-#include "CPipeServer.h"
+#include "transport/CPipeServer.h"
 
 NTSTATUS DriverEntry(_In_ PDRIVER_OBJECT  DriverObject, _In_ PUNICODE_STRING RegistryPath)
 {
@@ -98,4 +98,4 @@ VOID LGIddEvtDriverContextCleanup(_In_ WDFOBJECT DriverObject)
 #else
   WPP_CLEANUP(WdfDriverWdmGetDriverObject((WDFDRIVER)DriverObject));
 #endif
-}
+}