NavigationMenuContent constructor
      const
      NavigationMenuContent({})
     
    
Creates a NavigationMenuContent with the specified properties.
The title parameter is required as it provides the primary
label for the navigation option. All other parameters are
optional and enhance the content's functionality and appearance.
Parameters:
title(Widget, required): The primary title textcontent(Widget?, optional): Descriptive text below titleleading(Widget?, optional): Icon or widget before titletrailing(Widget?, optional): Widget after title and contentonPressed(VoidCallback?, optional): Action when item is pressed
Example:
NavigationMenuContent(
  leading: Icon(Icons.settings),
  title: Text('Settings'),
  content: Text('Manage application preferences'),
  trailing: Icon(Icons.arrow_forward_ios, size: 16),
  onPressed: _openSettings,
)
Implementation
const NavigationMenuContent({
  super.key,
  required this.title,
  this.content,
  this.leading,
  this.trailing,
  this.onPressed,
});