Summary:
This diff introduces:
- ScrollContainer
- Make sure Ant Link components always open URLs externally, to avoid users needing to use electron api's
- Introduce a design systems page where people can find docs on how to organise sandy layout, and it also provides a convenient way to test layout mechanisms.
- Fixed several layout bugs found as a result of adding the design system page
In next diff:
- more convenience around organizing paddings
- making the design system accessible from the menu
Reviewed By: cekkaewnumchai
Differential Revision: D23930274
fbshipit-source-id: 4aab058d15b3391287e0e32513a5d83831448857
e8370e9fc1