[user-story] Rent only one item from a package listing

[boaanes]

User story
As a rentee I need a way of only renting parts of a package listing in order to only rent the equipment I need.

Describe a potential solution
A way to cherry-pick the only certain items from a package listing. This could be implemented with a "checkbox"-like feature.

Additional context
A potential rentee may already have much of the equipment in a package listing(described in #5). An example of this is if I have ski boots, staves, and a helmet, but I need actual skis. However I can only find one listing for skis, and these are part of a package listing. I need to be able to cherry-pick the skis from the package listing.

Acceptance Criteria

• Select some parts of a package listing.
• Request to rent only selected listings.

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Work Tasks

• Create a way to select only some items from a package listing as if they were individual listings.
• Send a request to the rentor with just the selcted listings.