feat(gpu): add cardwire integration and gpu widget

modules/bar/GPUWidget.qml

@@ -0,0 +1,23 @@
+pragma ComponentBehavior: Bound
+
+import Quickshell
+import qs.config
+import qs.ui
+import qs.services
+
+BarButton {
+    id: root
+
+    hoverHighlight: false
+    pointerCursor: false
+    iconSource: GPU.icon
+
+    visible: GPU.connected && GPU.gpu !== null
+    opacity: GPU.gpu !== null && GPU.gpu.known ? 1 : 0
+
+    label: {
+        if (!GPU.gpu)
+            return "NA";
+        return GPU.gpu.blocked ? "Blocked" : "Active";
+    }
+}