Add index for help text

[xGladiate]

Add index for the invalid indexes or duplicate indexes

Commands with modified changes

• delete command for both person and delivery when there is duplicate or out-of-bound index
• archive & unarchive commands for both person and delivery when there is duplicate or out-of-bound index
• edit command for both person and delivery when the index is out-of-bound
• inspect command for person when the index is out-of-bound

Example of changes made:

[codecov]

Codecov Report

Attention: Patch coverage is 75.67568% with 9 lines in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
...a/seedu/address/logic/commands/ArchiveCommand.java	72.72%	3 Missing ⚠️
...va/seedu/address/logic/commands/DeleteCommand.java	72.72%	3 Missing ⚠️
...seedu/address/logic/commands/UnarchiveCommand.java	72.72%	3 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)
...java/seedu/address/logic/commands/EditCommand.java	48.67% <100.00%> (+0.27%)	14.00 <0.00> (ø)
...a/seedu/address/logic/commands/InspectCommand.java	59.09% <100.00%> (+11.47%)	5.00 <0.00> (+1.00)
...a/seedu/address/logic/commands/ArchiveCommand.java	57.65% <72.72%> (+5.23%)	21.00 <0.00> (+3.00)
...va/seedu/address/logic/commands/DeleteCommand.java	68.91% <72.72%> (+0.73%)	19.00 <0.00> (ø)
...seedu/address/logic/commands/UnarchiveCommand.java	58.00% <72.72%> (+5.82%)	20.00 <0.00> (+3.00)

[hm-yang1]

Overall LGTM!

[hm-yang1]

Minor nit: Naming of boolean. I had so many warnings from the iP.