config: update default config with quick-settings and Ximper defaults

src/config.json.in

 {
   "$schema": @JSONPATH@,
-  "ignore-gtk-theme": true,
   "positionX": "right",
   "positionY": "top",
   "layer": "overlay",
-  "control-center-layer": "top",
   "layer-shell": true,
-  "layer-shell-cover-screen": true,
   "cssPriority": "user",
-  "control-center-margin-top": 0,
-  "control-center-margin-bottom": 0,
-  "control-center-margin-right": 0,
+  "control-center-width": 400,
+  "control-center-height": 740,
+  "control-center-margin-top": 8,
+  "control-center-margin-bottom": 8,
+  "control-center-margin-right": 8,
   "control-center-margin-left": 0,
   "notification-2fa-action": true,
   "notification-inline-replies": false,
-  "notification-body-image-height": 100,
+  "notification-window-width": 400,
+  "notification-body-image-height": 160,
   "notification-body-image-width": 200,
-  "timeout": 10,
-  "timeout-low": 5,
-  "timeout-critical": 0,
-  "fit-to-screen": true,
-  "relative-timestamps": true,
-  "control-center-width": 500,
-  "control-center-height": 600,
-  "notification-window-width": 500,
+  "timeout": 4,
+  "timeout-low": 2,
+  "timeout-critical": 6,
+  "fit-to-screen": false,
   "keyboard-shortcuts": true,
-  "notification-grouping": true,
   "image-visibility": "when-available",
   "transition-time": 200,
   "hide-on-clear": false,
-  "hide-on-action": true,
-  "text-empty": "No Notifications",
-  "notification-visibility": {
-    "example-name": {
-      "state": "muted",
-      "urgency": "Normal",
-      "app-name": "example.app.id"
-    }
-  },
+  "hide-on-action": false,
   "widgets": [
+    "backlight",
+    "volume",
+    "quick-settings",
     "inhibitors",
+    "mpris",
     "title",
     "notifications"
   ],
   "widget-config": {
-    "notifications": {
-      "vexpand": true
-    },
-    "inhibitors": {
-      "text": "Inhibitors",
-      "clear-all-button": true
-    },
-    "title": {
-      "text": "Notifications",
-      "clear-all-button": true
-    },
-    "label": {
-      "max-lines": 5,
-      "text": "Label Text"
-    },
-    "mpris": {
-      "blacklist": []
+    "quick-settings": {
+      "tiles": [
+        { "type": "power-profiles" },
+        { "type": "dnd" },
+        { "type": "dark-mode" },
+        { "type": "night-light" },
+        { "type": "caffeine" }
+      ]
     }
   }
 }