title: How can we implement a hover effect on navigation rail in flutter?
body: <p>I am building a flutter application for web and desktop. I have used navigation rail for routing, but i can't figure out how to add a hover effect when the mouse is over a particular rail destination. There is a property to change the color depending upon which rail is being selected but i want to have a hover effect for the rail as well. How can i achieve this in flutter ?</p>
  <p>Any help will be appreciated. Thank you.</p>