Input Validation: Add Employee

[elizabethfoster02]

Link to PR: #168

Purpose
When we add a new employee on the Manage Profiles page, we want to confirm that the email entered is a real email and the phone number entered is a real phone number.

TODO

• Claim this ticket by adding your name and moving to "In Progress"
• Get updated with the codebase
  • git checkout dev
  • git pull
  • THEN create a new branch as per usual
  • npm install (this updates your dependencies)
  • npm run dev
• Implement description above
• Create a PR for this ticket
• Move this ticket into "Ready for Review"

Testing

• Desktop