Revert the Listing Commands back to using Index

[lrongyi]

Change logic and parsing for all Listing Commands that previously used Name.

[codecov]

Codecov Report

Attention: Patch coverage is 94.28571% with 8 lines in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
...c/commands/listingcommands/EditListingCommand.java	88.46%	1 Missing and 2 partials ⚠️
...ic/commands/listingcommands/AddListingCommand.java	91.66%	0 Missing and 2 partials ⚠️
...nds/listingcommands/AddBuyersToListingCommand.java	95.45%	0 Missing and 1 partial ⚠️
...commands/listingcommands/DeleteListingCommand.java	88.88%	0 Missing and 1 partial ⚠️
...istingcommands/RemoveBuyersFromListingCommand.java	96.15%	0 Missing and 1 partial ⚠️

Files with missing lines	Coverage Δ	Complexity Δ
...n/java/seedu/address/commons/core/index/Index.java	100.00% <100.00%> (ø)	14.00 <1.00> (+1.00)
src/main/java/seedu/address/logic/Messages.java	93.75% <ø> (ø)	4.00 <0.00> (ø)
...ommandparsers/AddBuyersToListingCommandParser.java	100.00% <100.00%> (ø)	6.00 <0.00> (+1.00)
...listingcommandparsers/AddListingCommandParser.java	94.73% <100.00%> (+0.98%)	5.00 <0.00> (+1.00)
...tingcommandparsers/DeleteListingCommandParser.java	100.00% <100.00%> (ø)	2.00 <0.00> (ø)
...istingcommandparsers/EditListingCommandParser.java	92.00% <100.00%> (-8.00%)	8.00 <0.00> (-1.00)
...dparsers/RemoveBuyersFromListingCommandParser.java	100.00% <100.00%> (ø)	5.00 <0.00> (ø)
...nds/listingcommands/AddBuyersToListingCommand.java	97.72% <95.45%> (-2.28%)	12.00 <1.00> (-1.00)
...commands/listingcommands/DeleteListingCommand.java	94.11% <88.88%> (-5.89%)	6.00 <1.00> (ø)
...istingcommands/RemoveBuyersFromListingCommand.java	98.00% <96.15%> (-2.00%)	14.00 <2.00> (+1.00)	⬇️
... and 2 more

... and 1 file with indirect coverage changes

[wang-h-z]

Looks great! Cutting it close!