NxSearchTextField class

A Material 3 search field widget with support for different visual states and custom styling.

This widget wraps Flutter's SearchBar widget and provides additional customization options for appearance and behavior. It includes a search icon by default and supports trailing widgets for additional actions.

The widget's appearance can be customized for different states (enabled, disabled, focused, hovered) using WidgetStateProperty parameters.

Example usage:

NxSearchTextField(
  onChanged: (value) {
    // Handle search text changes
  },
  onSubmitted: (value) {
    // Handle search submission
  },
  hintText: 'Search items...',
  fillColor: const WidgetStatePropertyAll<Color>(Colors.grey),
  trailing: [
    IconButton(
      icon: Icon(Icons.clear),
      onPressed: () {
        // Clear search
      },
    ),
  ],
)