Resolve Inspection Command Bug

[xGladiate]

Resolve the inspection command bug mentioned in #118.

Update: To throw error message

This command could not be executed in the inspection window.
Navigate back to the main window to continue.

when attempting to use inspect command in the inspection window.

[codecov]

Codecov Report

Attention: Patch coverage is 33.33333% with 2 lines in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
...a/seedu/address/logic/commands/InspectCommand.java	0.00%	2 Missing ⚠️

Files with missing lines	Coverage Δ	Complexity Δ
src/main/java/seedu/address/logic/Messages.java	94.87% <ø> (ø)	8.00 <0.00> (ø)
.../main/java/seedu/address/model/person/Archive.java	63.15% <100.00%> (ø)	7.00 <1.00> (ø)
...a/seedu/address/logic/commands/InspectCommand.java	47.61% <0.00%> (+47.61%)	4.00 <0.00> (+4.00)