Add usability add claim command

[RezwanAhmed123]

The add claim function only throws errors as of now, as it was being debugged.

Let's add functionality to the claim function for short term storage to ensure it is working as intended.

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 8.23529% with 78 lines in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
.../seedu/address/logic/commands/AddClaimCommand.java	0.00%	21 Missing :warning:
...du/address/model/person/insurance/claim/Claim.java	0.00%	20 Missing :warning:
...du/address/logic/parser/AddClaimCommandParser.java	0.00%	15 Missing :warning:
...in/java/seedu/address/logic/parser/ParserUtil.java	0.00%	11 Missing :warning:
.../model/person/insurance/InsurancePlansManager.java	11.11%	8 Missing :warning:
src/main/java/seedu/address/logic/Messages.java	0.00%	2 Missing :warning:
.../seedu/address/logic/parser/AddressBookParser.java	0.00%	1 Missing :warning:

Files with missing lines	Coverage Δ	Complexity Δ
...du/address/logic/commands/AddInsuranceCommand.java	21.42% <ø> (ø)	3.00 <0.00> (ø)
...ain/java/seedu/address/logic/parser/CliSyntax.java	88.88% <100.00%> (+3.17%)	1.00 <0.00> (ø)
.../address/model/person/insurance/InsurancePlan.java	87.50% <100.00%> (+4.16%)	6.00 <0.00> (ø)
.../seedu/address/logic/parser/AddressBookParser.java	91.30% <0.00%> (-8.70%)	14.00 <0.00> (ø)
src/main/java/seedu/address/logic/Messages.java	80.00% <0.00%> (-8.89%)	3.00 <0.00> (ø)
.../model/person/insurance/InsurancePlansManager.java	65.21% <11.11%> (-13.17%)	15.00 <0.00> (ø)
...in/java/seedu/address/logic/parser/ParserUtil.java	73.58% <0.00%> (-19.28%)	15.00 <0.00> (ø)
...du/address/logic/parser/AddClaimCommandParser.java	0.00% <0.00%> (ø)	0.00 <0.00> (?)
...du/address/model/person/insurance/claim/Claim.java	0.00% <0.00%> (ø)	0.00 <0.00> (?)
.../seedu/address/logic/commands/AddClaimCommand.java	0.00% <0.00%> (ø)	0.00 <0.00> (?)

[RezwanAhmed123]

refer to PR #101