FEAT: experimental release of Windows kernel drivers generation support for Red/System.

Usage: provide an adequate `on-load` entry point to your driver and compile with -t WinDRV target. Cross-compilation is not supported for now as it needs a win32 DLL for calculating the driver file header checksum.

Example:

#enum NTSTATUS! [
	STATUS_SUCCESS
]

on-load: func [
	DriverObject [driver-object!]   ;-- predefined type (empty struct for now)
   	RegistryPath [byte-ptr!]	;-- Unicode string (UTF-16LE)
   	return: [NTSTATUS!]
][
	STATUS_SUCCESS
]