Sabrina/cart recycler view adapter

[sabrina-li]

logic to populate RecyclerView for cart fragment, and handle click to remove 1 unit of item from cart

These code largely duplicate from the market fragment(mainly the adapter and maybe hanlders), however, I think it's worth separating the adapters and handlers. If the app evolves and get sophisticated, we may have more different functionalities between the two views to worth separating the code and.

Open to argument if we should reuse these code.

[patrick-fs]

Open to argument if we should reuse these code.

If you're seeing a ton of functional overlap (i.e. market and cart components are doing the same thing but only the names are changing) then it might be a good idea to consolidate into a shared component. This can be a future refactor.

[patrick-fs]

LGTM. Thoughts for a future enhancement from an Android newb: include a high-level outline of your architecture (basically a bullet-point list of how you've defined your directory structure and the relationships between ViewModels, Handler, Adapters, Layouts, etc.)

[sabrina-li]

Thanks for the input!
I thought the view would be different but since everything is done through data binding, the adapter turned out to be largely the same. I'll create a simple readme later to explain the app and how to.