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.

Common/DankSocket.qml

@@ -0,0 +1,62 @@
+import QtQuick
+import Quickshell.Io
+
+Item {
+    id: root
+
+    property alias path: socket.path
+    property alias parser: socket.parser
+    property bool connected: false
+
+    property int reconnectBaseMs: 400
+    property int reconnectMaxMs: 15000
+
+    property int _reconnectAttempt: 0
+
+    signal connectionStateChanged()
+
+    onConnectedChanged: {
+        socket.connected = connected
+    }
+
+    Socket {
+        id: socket
+
+        onConnectionStateChanged: {
+            root.connectionStateChanged()
+            if (connected) {
+                root._reconnectAttempt = 0
+                return
+            }
+            if (root.connected) {
+                root._scheduleReconnect()
+            }
+        }
+    }
+
+    Timer {
+        id: reconnectTimer
+        interval: 0
+        repeat: false
+        onTriggered: {
+            socket.connected = false
+            Qt.callLater(() => socket.connected = true)
+        }
+    }
+
+    function send(data) {
+        const json = typeof data === "string" ? data : JSON.stringify(data)
+        const message = json.endsWith("\n") ? json : json + "\n"
+        socket.write(message)
+        socket.flush()
+    }
+
+    function _scheduleReconnect() {
+        const pow = Math.min(_reconnectAttempt, 10)
+        const base = Math.min(reconnectBaseMs * Math.pow(2, pow), reconnectMaxMs)
+        const jitter = Math.floor(Math.random() * Math.floor(base / 4))
+        reconnectTimer.interval = base + jitter
+        reconnectTimer.restart()
+        _reconnectAttempt++
+    }
+}