Plan backend structure

[SamanthaGuillemette]

collections needed:

• [x] Notifications
• [x] Symptoms
• [x] Diary
• [x] Appointments

Consolidations:

• [x] Combine Patients and Clients
• [x] Combine Doctors and Admins (sub-collection?)

[SamanthaGuillemette]

Update on Issue:

• Some fields of dr info in client app are not present in the admin collection. This needs to be revised.
• Also Diary sub-collection isn't created yet.

[SamanthaGuillemette]

Done!