Add framework for responsive breakpoints

[catarak]

Nature of issue?

• New feature request

New feature details:

In order to make the web editor mobile/responsive, we need to make decisions about how we want to lay the groundwork.

With the merge of the Storybook PR (#1244), it begins the move from scss to styled-compoments. Therefore, I think it makes sense to put in these breakpoints with styled components, following a style similar to this:

How to use media queries in styled components

For anytime we'd like to render different components based on the screen size, we could use (react-responsive)[https://github.com/contra/react-responsive], though as far as I know it's better to try to handle responsive design in CSS.

cc @ghalestrilo

[catarak]

react-responsive has been added to this project ✨