v1.3: Create roles, link command and change find and delete
We have created several new features for the MVP of our product
Add Role
You can now add persons with roles. Right now the only 2 roles supported are patients and caregivers


Add Link
You can now link a patient to a caregiver
This is done by
link patient/PATIENT_NRIC caregiver/CAREGIVER_NRIC
Find patient by NRIC
You can also now find a patient by NRIC


Delete Patient by NRIC
The delete function has changed to delete by NRIC instead of index
delete [NRIC]
