Branch refine output message

[jereeemyyyy]

Things done

• Refine output message for some classes

close #173

[rubinnn]

LGTM

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Files with missing lines	Coverage Δ	Complexity Δ
.../java/seedu/address/logic/commands/AddCommand.java	100.00% <ø> (ø)	8.00 <0.00> (ø)
...va/seedu/address/logic/commands/DeleteCommand.java	100.00% <ø> (ø)	9.00 <0.00> (ø)
...edu/address/logic/commands/FindAddressCommand.java	100.00% <100.00%> (ø)	7.00 <1.00> (+1.00)
.../address/logic/commands/FindClientTypeCommand.java	100.00% <100.00%> (ø)	8.00 <1.00> (+1.00)
...java/seedu/address/logic/commands/FindCommand.java	100.00% <ø> (ø)	6.00 <0.00> (-1.00)
.../seedu/address/logic/commands/FindNameCommand.java	100.00% <100.00%> (ø)	7.00 <1.00> (+1.00)
...seedu/address/logic/commands/FindPhoneCommand.java	100.00% <100.00%> (ø)	7.00 <1.00> (+1.00)
...a/seedu/address/logic/parser/AddCommandParser.java	100.00% <ø> (ø)	11.00 <0.00> (ø)