Morph tags field to medical conditions

[lamlaaaam]

Also added header and modified ADD input to take in medical conditions. [m/condition].
Resolves #76 and #40

[codecov]

Codecov Report

Merging #82 into master will decrease coverage by 0.00%.
The diff coverage is 89.02%.

@@             Coverage Diff              @@
##             master      #82      +/-   ##
============================================
- Coverage     72.33%   72.33%   -0.01%     
  Complexity      389      389              
============================================
  Files            69       69              
  Lines          1193     1200       +7     
  Branches        119      119              
============================================
+ Hits            863      868       +5     
- Misses          299      301       +2     
  Partials         31       31              

Impacted Files	Coverage Δ	Complexity Δ
.../java/seedu/address/logic/commands/AddCommand.java	100.00% <ø> (ø)	8.00 <0.00> (ø)
src/main/java/seedu/address/ui/AnimalCard.java	0.00% <0.00%> (ø)	0.00 <0.00> (ø)
...dress/model/medicalcondition/MedicalCondition.java	80.00% <80.00%> (ø)	5.00 <5.00> (?)
.../seedu/address/logic/parser/EditCommandParser.java	92.30% <87.50%> (+0.64%)	10.00 <4.00> (ø)
...c/main/java/seedu/address/model/animal/Animal.java	97.22% <88.88%> (ø)	18.00 <2.00> (ø)
...java/seedu/address/logic/commands/EditCommand.java	96.82% <100.00%> (+0.10%)	12.00 <0.00> (ø)
...a/seedu/address/logic/parser/AddCommandParser.java	100.00% <100.00%> (ø)	5.00 <0.00> (ø)
...ain/java/seedu/address/logic/parser/CliSyntax.java	80.00% <100.00%> (ø)	1.00 <0.00> (ø)
...in/java/seedu/address/logic/parser/ParserUtil.java	96.77% <100.00%> (ø)	12.00 <4.00> (ø)
.../java/seedu/address/model/util/SampleDataUtil.java	61.53% <100.00%> (ø)	2.00 <0.00> (ø)
... and 4 more

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