Partial Widgets - Code Refactoring

If we look at our categories_list.dart file - it is getting a bit long. So let's make this lesson about refactoring some code into separate files. Here's what we will do:

• Move our Model into its own file
• Move all of our API calls into a service file
• Move the Category Edit button into its own file (along with all the logic)

These actions will set us up for a more modular and maintainable codebase.

Moving Category Model

Let's start by moving our simplest code - the Category model. Create a new...