Add sorting to appointment list

[ktaekwon000]

No description provided.

[codecov]

Codecov Report

Merging #135 into implement-appointment-class will decrease coverage by 0.03%.
The diff coverage is 0.00%.

@@                        Coverage Diff                        @@
##             implement-appointment-class     #135      +/-   ##
=================================================================
- Coverage                          67.05%   67.01%   -0.04%     
  Complexity                           592      592              
=================================================================
  Files                                 96       96              
  Lines                               1988     1989       +1     
  Branches                             237      237              
=================================================================
  Hits                                1333     1333              
- Misses                               572      573       +1     
  Partials                              83       83              

Impacted Files	Coverage Δ	Complexity Δ
...a/seedu/address/model/appointment/Appointment.java	52.50% <0.00%> (-1.35%)	14.00 <0.00> (ø)
...in/java/seedu/address/ui/AppointmentListPanel.java	0.00% <0.00%> (ø)	0.00 <0.00> (ø)

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[gsmoon97]

LGTM!