Add notifications for doctor notes

[Ashesh3]

Continuation of #1553

Changes

• Create webpush notification on note creation
• Send patient_id and facility_id in the message
• Add new notification type PATIENT_NOTE_ADDED
• fixes make patient notes realtime  #1552

@coronasafe/care-backend-maintainers @coronasafe/care-backend-admins

[codecov]

Codecov Report

Attention: 3 lines in your changes are missing coverage. Please review.

Comparison is base (0daef7f) 60.02% compared to head (ab0420f) 60.10%.
Report is 2 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1688      +/-   ##
==========================================
+ Coverage   60.02%   60.10%   +0.07%     
==========================================
  Files         208      208              
  Lines       11319    11339      +20     
  Branches     1606     1610       +4     
==========================================
+ Hits         6794     6815      +21     
+ Misses       4301     4299       -2     
- Partials      224      225       +1     

Files	Coverage Δ
care/facility/models/notification.py	100.00% <100.00%> (ø)
care/facility/api/viewsets/patient.py	63.23% <83.33%> (+0.90%)	⬆️
care/utils/notification_handler.py	51.93% <71.42%> (+1.27%)	⬆️

... and 1 file with indirect coverage changes

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[nihal467]

LGTM