add systemd and machinectl bar modules with applets

shell/modules/MachinectlModule.qml

@@ -0,0 +1,44 @@
+import QtQuick
+import Quickshell
+import "." as M
+import "../services" as S
+import "../applets" as C
+
+M.BarModule {
+    id: root
+    active: S.Modules.machinectl.enable
+    tooltip: {
+        const n = S.MachinectlService.machines.length;
+        return n === 0 ? "no containers" : n + " container" + (n === 1 ? "" : "s");
+    }
+    panelNamespace: "nova-machinectl"
+    panelContentWidth: 320
+    panelComponent: Component {
+        C.MachinectlApplet {
+            width: parent.width
+            accentColor: root.accentColor
+            active: root._showPanel
+        }
+    }
+
+    Connections {
+        target: S.MachinectlService
+        function onMachineReady() {
+            root.keepPanelOpen(300);
+        }
+    }
+
+    readonly property color _stateColor: S.MachinectlService.anyUnhealthy ? S.Theme.base0A : root.accentColor
+
+    M.BarIcon {
+        icon: ""
+        color: root._stateColor
+        anchors.verticalCenter: parent.verticalCenter
+    }
+    M.BarLabel {
+        label: S.MachinectlService.machines.length.toString()
+        minText: "9"
+        color: root._stateColor
+        anchors.verticalCenter: parent.verticalCenter
+    }
+}