New department tab in Admin Panel

[amit-s19]

Todo

1. Create a new tab of "department"
2. This department tab should only be accessible by a "Super Admin"
3. This tab shows the departments available
4. Super Admin can create or view departments

[amit-s19]

@geeky-abhishek to provide APIS

1. Create a new department
2. List all departments
3. Get a particular department