Implement user State

[Ben-Tewfik]

Task title
Implement User State

Task description
We need to enhance the user experience by implementing a user state in the profile dropdown component in the Navbar to determine whether the user is logged in. Additionally, we want to implement a logout function in the profile drop-down component and modify the user data sent to Firebase from the signup page. Here are the details:

Subtasks

• Implement User State in the profile dropdown component

• implement a function to handle user logout

• Modify Sign-up Page.