[native] introduce barebones bottom sheet component

Summary:
This components introduces the barebones bottom sheet component. This component is meant to be a generic component that is feature agnostic and can be reused for any future bottom sheet we might want to create. I am very much working off the idea that this is far from the finished bottom sheet component, and some stuff here might not look super polished and a fair amount of this will change. I thought for review this would be easier to follow the progression of this component as I add the bits and pieces to it rather than just getting the final thing.

This diff also introduces a new folder called bottom-sheets. I thought this would be appropriate to add given that we likely will be using bottom sheets a lot in our app soon (profiles, message toolitps, any other place we use actionsheet) and it would make sense to have a folder to house all of this.

Here is design for reference:

Depends on D8935

Test Plan:
Please see the demo video to see how the bottom sheet looks/behaves so far

Reviewers: atul, inka, tomek

Reviewed By: atul, tomek

Subscribers: ted, ashoat, tomek

Differential Revision: https://phab.comm.dev/D8955