Reformat appointment command

[Ella-e]

Change adda format to : 'adda ic/ NRIC time/ dd/MM/yyyy HHmm'
Change deletea format to : "deletea INDEX"

[codecov]

Codecov Report

Attention: Patch coverage is 62.79070% with 16 lines in your changes are missing coverage. Please review.

Project coverage is 67.73%. Comparing base (bac086e) to head (19321be).

Files	Patch %	Lines
.../vitalconnect/logic/commands/CreateAptCommand.java	46.66%	7 Missing and 1 partial ⚠️
...alconnect/logic/parser/CreateAptCommandParser.java	61.53%	1 Missing and 4 partials ⚠️
...ain/java/vitalconnect/logic/parser/ParserUtil.java	60.00%	2 Missing ⚠️
.../vitalconnect/logic/commands/DeleteAptCommand.java	75.00%	0 Missing and 1 partial ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##             master      #84      +/-   ##
============================================
+ Coverage     67.55%   67.73%   +0.18%     
+ Complexity      585      584       -1     
============================================
  Files           100      100              
  Lines          2022     2021       -1     
  Branches        214      215       +1     
============================================
+ Hits           1366     1369       +3     
+ Misses          575      569       -6     
- Partials         81       83       +2     

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[MaYuehan]

Looks good and commands' format become more consistent.

[MaYuehan]

Nice