Update Time Off request form options and approval flow

Requested updates to the current Time Off request form:

• Allow 4 hours off in addition to 8 hours, with a way to indicate times.
• Add Sick and Vacation time off types in addition to Unpaid.
• Restrict the employee list so only the current user can select their own name, if that is not already enforced.
• Route approvals first to the supervisor, then to Admin for payroll / UKG.
• Add supervisor information, possibly under the inspector profile.
• If possible, block off inspectors on the calendar as Paid Time Off or Unpaid Time Off.

This was described as non-critical but helpful for managing capacity more quickly.