service: Add ncm services

Adds the basic skeleton for the ncm services based off information on
Switch Brew.

src/core/hle/service/ncm/ncm.h

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+// Copyright 2018 yuzu emulator team
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+namespace Service::SM {
+class ServiceManager;
+}
+
+namespace Service::NCM {
+
+void InstallInterfaces(SM::ServiceManager& sm);
+
+} // namespace Service::NCM