[kwin] Fix genericscripted config

* Use metadata as json
* set Q_PLUGIN_METADATA and Q_INTERFACES
* port away from kde4_add_plugin

Only tested with effects, scripts might need further adjustements.

REVIEW: 116862

scripting/CMakeLists.txt

@@ -1,10 +1,9 @@
 set(kcm_kwin4_genericscripted_SRCS genericscriptedconfig.cpp)
-kde4_add_plugin( kcm_kwin4_genericscripted ${kcm_kwin4_genericscripted_SRCS} )
+add_library(kcm_kwin4_genericscripted MODULE ${kcm_kwin4_genericscripted_SRCS})
 target_link_libraries( kcm_kwin4_genericscripted
     KF5::ConfigWidgets #KCModule
     KF5::I18n
     KF5::Service
-    KF5::Plasma
     Qt5::DBus
     Qt5::UiTools )
-install( TARGETS kcm_kwin4_genericscripted DESTINATION ${PLUGIN_INSTALL_DIR} )
+install( TARGETS kcm_kwin4_genericscripted DESTINATION ${PLUGIN_INSTALL_DIR}/kwin/effects/configs )

scripting/genericscriptedconfig.h

@@ -30,11 +30,13 @@ namespace KWin
 class GenericScriptedConfigFactory : public KPluginFactory
 {
     Q_OBJECT
+    Q_PLUGIN_METADATA(IID "org.kde.KPluginFactory"  FILE "genericscriptedconfig.json" )
+    Q_INTERFACES(KPluginFactory)
 public:
     GenericScriptedConfigFactory();
 
 protected:
-    virtual QObject *create(const char *iface, QWidget *parentWidget, QObject *parent, const QVariantList &args, const QString &keyword);
+    QObject *create(const char *iface, QWidget *parentWidget, QObject *parent, const QVariantList &args, const QString &keyword) override;
 };
 
 class GenericScriptedConfig : public KCModule

scripting/genericscriptedconfig.json

@@ -0,0 +1,7 @@
+{
+    "Type": "Service",
+    "X-KDE-Library": "kcm_kwin4_genericscripted",
+    "X-KDE-ServiceTypes": [
+        "KCModule"
+    ]
+}