Use cmake function instead of kcfgc

src/CMakeLists.txt

@@ -423,7 +423,7 @@ if (TARGET KF6::Crash)
     target_link_libraries(neochat PUBLIC KF6::Crash)
 endif()
 
-kconfig_add_kcfg_files(neochat GENERATE_MOC neochatconfig.kcfgc)
+kconfig_target_kcfg_file(neochat FILE neochatconfig.kcfg CLASS_NAME NeoChatConfig MUTATORS GENERATE_PROPERTIES DEFAULT_VALUE_GETTERS PARENT_IN_CONSTRUCTOR SINGLETON GENERATE_MOC )
 
 if(NEOCHAT_FLATPAK)
     target_compile_definitions(neochat PUBLIC NEOCHAT_FLATPAK)

src/neochatconfig.kcfgc

@@ -1,9 +0,0 @@
-# SPDX-FileCopyrightText: 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
-Singleton=true