native NetworkManager + all native dbus bindings via dms

- Scrap janky NetworkService in favor of, dms' native NM integration
  socket
- Scrap all gdbus usage in favor of native dbus bindings in dms
  (loginctl, freedesktop)

It means that - some features won't work if running without dms wrapper.

But the trade off is certainly worth it, in the long-run for efficiency
improvements.

Services/VpnService.qml

@@ -9,6 +9,20 @@ import Quickshell.Io
 Singleton {
     id: root
 
+    property int refCount: 0
+
+    onRefCountChanged: {
+        console.log("VpnService: refCount changed to", refCount)
+        if (refCount > 0 && !nmMonitor.running) {
+            console.log("VpnService: Starting nmMonitor")
+            nmMonitor.running = true
+            refreshAll()
+        } else if (refCount === 0 && nmMonitor.running) {
+            console.log("VpnService: Stopping nmMonitor")
+            nmMonitor.running = false
+        }
+    }
+
     // State
     property bool available: true
     property bool isBusy: false
@@ -36,18 +50,6 @@ Singleton {
 
     // Use implicit property notify signals (profilesChanged, activeUuidChanged, etc.)
 
-    Component.onCompleted: initialize()
-
-    Component.onDestruction: {
-        nmMonitor.running = false
-    }
-
-    function initialize() {
-        // Start monitoring NetworkManager for changes
-        nmMonitor.running = true
-        refreshAll()
-    }
-
     function refreshAll() {
         listProfiles()
         refreshActive()