Create a Figma Clone app with Flutter and Supabase Realtime

In this tutorial, we will create a collaborative design canvas using Flutter and Supabase. We will learn how to implement real-time communication between multiple clients using the Broadcast feature of Supabase Realtime, and how to broadcast the shape and cursor data to other connected clients in real-time. The app will allow users to draw shapes and move those shapes around while keeping the states in sync with other users. To create this collaborative design canvas, we will follow these steps: 1. Set up a new Flutter project 2. Create the data models for UserCursor and CanvasObject 3. Implement a custom painter to draw objects on the canvas 4. Initialize the Supabase client and set up real-time listeners 5. Create the canvas page with all necessary widgets and methods 6. Run the application By following these steps, you will learn how to create a collaborative design app using Flutter and Supabase Realtime Broadcast feature.