Add feature to retrieve user details from Firebase Realtime Database based on username in URL

[adhilsalim]

We would like to suggest adding a feature to our application that allows users to access their pages by simply entering their username in the URL. Specifically, when a user enters a URL of the format "blankspacecommunity.web.app/user/", we propose that the application should extract the from the URL and search for the corresponding user in the Firebase Realtime Database.

If the user exists in the database, the application should retrieve their details and display the user's page. If the user does not exist, the application should redirect to a 404 error page.