applets/swkbd: Implement DefaultCitraKeyboard

src/core/frontend/applets/default_applets.h

@@ -0,0 +1,13 @@
+// Copyright 2018 Citra Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+namespace Frontend {
+/**
+ * Registers default, frontend-independent applet implementations.
+ * Will be replaced later if any frontend-specific implementation is available.
+ */
+void RegisterDefaultApplets();
+} // namespace Frontend