Add modular dashboard widgets and layout editor

Introduces a modular dashboard system with draggable, configurable widgets including revenue, low stock, recent customers, and pending chats. Adds a dashboard editor for layout customization, widget visibility, and settings. Refactors dashboard content to use the new widget system and improves UI consistency and interactivity.

package.json

@@ -17,6 +17,9 @@
     "analyze": "ANALYZE=true next build"
   },
   "dependencies": {
+    "@dnd-kit/core": "^6.3.1",
+    "@dnd-kit/sortable": "^10.0.0",
+    "@dnd-kit/utilities": "^3.2.2",
     "@hookform/resolvers": "^3.9.1",
     "@radix-ui/react-accordion": "^1.2.2",
     "@radix-ui/react-alert-dialog": "^1.1.4",
@@ -91,4 +94,4 @@
     "tailwindcss": "^3.4.17",
     "typescript": "^5"
   }
-}
+}