How to Implement Transition with GoRouter Navigation

Hello,

I've been exploring the nested_navigation_examples repository and am particularly interested in implementing custom transitions using GoRouter for navigation within the nested structures provided in the examples.

Could you provide guidance or an example on how to integrate custom transitions (e.g., fade-in, slide-up) when navigating between pages using GoRouter in the context of this repository?.

Any tips, code snippets, or references to where I might find more information on this topic would be greatly appreciated.

Thank you for your time and the excellent work on this repository!