Add zone superadministrator role with enhanced NS/CAA record permissions

[ictud]

Summary of changes

Key changes:

• Added new zone-super-administrator role to enum access_level (migration 007.php)
• Added is_zone_super_administrator() method to User class
• Added user info display in top navigation bar (Name Surname (username))

What zone super administrators can do:

• Edit NS and CAA records (previously only global admins could do this)
• Edit zone SOA settings (previously only global admins could do this)
• Approve/reject change requests
• Add new NS and CAA records

Security improvements:

• Restricted NS and CAA record editing for standard operators and zone administrators
• Added JavaScript validation to prevent unauthorized editing attempts
• Added visual styling for read-only records (opacity, cursor, hover effects)
• Updated email notifications to include super administrators

UI/UX improvements:

• Added user info display in top navigation bar showing "Name Surname (username)" with user icon