Feature Description

Add a field for the name of the school to the teacher and student sign up page for the project. This will help us group teachers and students from the same school, and prevent conflicts between classrooms in different schools.

Done Criteria

1. A "School" field is added to the Sign Up page
2. A teacher and student can see the "School" field in the profile section
3. Teachers and Students will only be able to access the classrooms of their own school.
4. Optional: The School name is displayed in the header of the side menu