Add KConfigXt configs

src/neochatconfig.kcfgc

@@ -0,0 +1,8 @@
+# SPDX-FileCopyrightText: (C) 2020 Carl Schwan <carl@carlschwan.eu>
+# SPDX-License-Identifier: LGPL-2.1-or-later
+File=neochatconfig.kcfg
+ClassName=NeoChatConfig
+Mutators=true
+DefaultValueGetters=true
+GenerateProperties=true
+ParentInConstructor=true