Implement add contacts

[martinng01]

No description provided.

[codecov]

Codecov Report

Attention: Patch coverage is 81.92090% with 32 lines in your changes are missing coverage. Please review.

Project coverage is 68.69%. Comparing base (8473993) to head (66c9fc6).

Files	Patch %	Lines
...java/seedu/address/logic/commands/EditCommand.java	0.00%	14 Missing ⚠️
...c/main/java/seedu/address/model/person/Person.java	76.92%	1 Missing and 5 partials ⚠️
src/main/java/seedu/address/ui/PersonCard.java	0.00%	3 Missing ⚠️
...in/java/seedu/address/logic/parser/ParserUtil.java	86.66%	1 Missing and 1 partial ⚠️
.../java/seedu/address/model/util/SampleDataUtil.java	50.00%	2 Missing ⚠️
.../seedu/address/logic/parser/EditCommandParser.java	0.00%	1 Missing ⚠️
...n/java/seedu/address/model/person/BankDetails.java	92.85%	1 Missing ⚠️
...ava/seedu/address/model/person/EmploymentType.java	92.85%	1 Missing ⚠️
src/main/java/seedu/address/model/person/Name.java	75.00%	1 Missing ⚠️
src/main/java/seedu/address/model/person/Sex.java	92.85%	1 Missing ⚠️

Additional details and impacted files

@@               Coverage Diff                @@
##             add-delete      #30      +/-   ##
================================================
- Coverage         75.26%   68.69%   -6.57%     
+ Complexity          419      414       -5     
================================================
  Files                71       74       +3     
  Lines              1338     1415      +77     
  Branches            126      135       +9     
================================================
- Hits               1007      972      -35     
- Misses              301      408     +107     
- Partials             30       35       +5     

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