SettingsDaemon: add updateFontConfig dbus interface

settings-daemon/theme/com.cutefish.Theme.xml

@@ -42,6 +42,7 @@
     </method>
 
     <method name="applyXResources"></method>
+    <method name="updateFontConfig"></method>
 
     <property name="isDarkMode" type="b" access="read"/>
     <property name="darkModeDimsWallpaer" type="b" access="read"/>

settings-daemon/theme/thememanager.h

@@ -88,6 +88,8 @@ public:
     QString iconTheme() const;
     void setIconTheme(const QString &iconTheme);
 
+    void updateFontConfig();
+
 signals:
     void darkModeChanged(bool darkMode);
     void wallpaperChanged(QString path);
@@ -105,7 +107,6 @@ private:
     void updateGtkFont();
     void updateGtkDarkTheme();
     void updateGtkIconTheme();
-    void updateFontConfig();
 
     QSettings *m_settings;