Feature: Add WhatsApp notifications for collection-ready orders

- Implement WhatsApp Business API integration via Meta Cloud API
- Add phoneNumber field to Order model for storing customer phone numbers
- Update admin order detail page with phone number input for collection orders
- Send WhatsApp notification when admin marks order as ready for collection
- Add WhatsApp service module with phone number formatting and message sending
- Create database migrations for collection-related fields
- Add WhatsApp credentials to .env configuration

Co-Authored-By: Claude Haiku 4.5 <noreply@anthropic.com>

.claude/settings.local.json

@@ -91,7 +91,9 @@
       "Bash(git commit -m 'Add: Shipping selector component and checkout integration *)",
       "Bash(node clear-pending-orders.js)",
       "mcp__visualize__read_me",
-      "mcp__visualize__show_widget"
+      "mcp__visualize__show_widget",
+      "Bash(git branch *)",
+      "Bash(git remote *)"
     ]
   }
 }