Design and develop one of the following systems using flutter (I want to run it on android/ios/web): *******Design Any One Of Them******** ----- Importantttttt ---- I want codes not explenation

Please include all the files, especially pubspec.yaml

A) A food delivery system:

The system must have the following features:

1. Push Notifications in On-Demand Food Ordering App

2. Promo & Offer Management

3. Real-Time GPS Tracking of Food Delivery

4. Simplify The Order Placement Process

5. Social Media Integration

6. Customer Feedback, Rating & Reviews

7. Easy Order Placement

8. Multiple Payment Options & Payment Gateway Integration

9. Menu optimization

B) eCommerce System:

The system must have the following features:

1. User-Friendly Interface

2. Secure payment processing system

3. Dynamic Sign In and Sign Out Experience

4. Multiple Payment Gateways

5. HD Quality Product Image

6. Instant search suggestions

7. Beautiful & Powerful Admin Panel

8. Multiple Currencies

9. Multiple Countries, States & Cities

10. Advanced Home Page Builder

11. Drag and Drop Feature

12. Coupon Code Applying Option

13. Advanced Product Filtering

14. Customer Panel

15. In Detail Product Specification

16. Media Gallery

17. Smooth Product Purchase Experience

C) Taxi Booking System:

The system must have the following features:

1. Effortless booking and easy navigation

2. Promo & Offer Management

3. Digital wallets for easy and cashless payments

4. Interaction with the cab drivers with one-touch communication.

5. Enable customers to track the status of their dispatched cab

6. Improved ride experiences through ratings and reviews

7. Send timely notifications and alerts

8. In-App maps navigation to provide the shortest route

9. Operate and manage all ride requests on a real-time basis

10. View and manage all ride bookings on the dashboard.

Customer App ( IOS , Android)

11. Give real-time alerts to your customers & drivers through push & SMS.

12. Track the fleet in real-time to know their ride status, availability and location.