Add RequestCart Pattern

[sdellis]

A RequestCart component is a "shopping cart" like component that allows users to request library items, modeled after a typical Shopify-style cart. Initial work will be for PulfaLight archives requests via Aeon, but this could be a consistent "facade" for all Library requests.

RequestCart will be comprised of:

• CartButton (should toggle to allow add/remove from cart)
• CartCheckbox (should toggle to allow add/remove from cart)
• CartInventory
• RequestCart

Question: Should we allow "Add to Request Cart" as well as a "Request Now" option?

[sdellis]

Also, the cart inventory will need to work across multiple pages. The proposed solution is to use Vuex storage with client-side (localStorage) persistence.

Two potential approaches:

• https://www.mikestreety.co.uk/blog/vue-js-using-localstorage-with-the-vuex-store
• https://flaviocopes.com/vuex-persist-localstorage/