Very basic theming support

Services/Settings.qml

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+pragma Singleton
+
+import QtQuick
+import Quickshell
+import Quickshell.Io
+import qs.Services
+
+Singleton {
+  id: root
+
+  property string shellName: "Noctalia"
+  property string settingsDir: Quickshell.env("NOCTALIA_SETTINGS_DIR")
+                               || (Quickshell.env("XDG_CONFIG_HOME")
+                                   || Quickshell.env(
+                                     "HOME") + "/.config") + "/" + shellName + "/"
+  property string settingsFile: Quickshell.env("NOCTALIA_SETTINGS_FILE")
+                                || (settingsDir + "Settings.json")
+  property string themeFile: Quickshell.env("NOCTALIA_THEME_FILE")
+                             || (settingsDir + "Theme.json")
+
+  Item {
+    Component.onCompleted: {
+      // ensure settings dir
+      Quickshell.execDetached(["mkdir", "-p", settingsDir])
+    }
+  }
+}