Add documentation explaining routing and navigation structure in base/web #2872
Description
What is the issue you are encountering with the docs?
Overview
The base/web project uses a routing and navigation setup that may not be immediately obvious to new contributors. Adding a short explanation of how routing is structured would make it easier to understand and work with the codebase.
Problem Description
Without documentation, contributors often need to search through multiple files to figure out where routes are defined and how navigation is wired together. This can slow down onboarding and make simple changes feel more complex than necessary.
Describe the solution you'd like to see.
Add a concise documentation section that explains where routes live, how layouts are applied, and how navigation components connect to routing. The goal should be to help contributors make routing-related changes with confidence.