Add company name feature into AddressBook

[Lalelulilulela]

Add Company Name feature into AddressBook.

• Use cn/ as parameter
• Should only be up to 100 characters

[dabzpengu]

resolved conflicts

[codecov]

Codecov Report

Attention: Patch coverage is 80.70175% with 11 lines in your changes are missing coverage. Please review.

Project coverage is 76.93%. Comparing base (108382c) to head (98a9ee7).

Files	Patch %	Lines
.../java/seedu/address/model/util/SampleDataUtil.java	0.00%	5 Missing ⚠️
.../java/seedu/address/storage/JsonAdaptedPerson.java	44.44%	3 Missing and 2 partials ⚠️
src/main/java/seedu/address/ui/PersonCard.java	0.00%	1 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##             master      #30      +/-   ##
============================================
+ Coverage     76.65%   76.93%   +0.28%     
- Complexity      460      474      +14     
============================================
  Files            73       74       +1     
  Lines          1465     1509      +44     
  Branches        142      149       +7     
============================================
+ Hits           1123     1161      +38     
- Misses          306      310       +4     
- Partials         36       38       +2     

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[dabzpengu]

LGTM :)