Wayland Layers: Breaking changes

- renamed some layers from "quickshell-*" to "noctalia-*"
- added screen name to all layers, ex: "noctalia-wallpaper-DP1"
- added a way to disable overview management in the settings, this allow
stationnary wallpaper on niri

Commons/Settings.qml

@@ -246,6 +246,7 @@ Singleton {
     // wallpaper
     property JsonObject wallpaper: JsonObject {
       property bool enabled: true
+      property bool overviewEnabled: true
       property string directory: ""
       property bool enableMultiMonitorDirectories: false
       property bool recursiveSearch: false