Replace styled-jsx with styled-components

[schickling]

styled-jsx introduces a lot of build-time complexity. Would be great if it could be replaced with styled-components.

[steida]

Just curious which complexity? styled-components are by my observation much leaky abstraction.

[schickling]

The current build-setup is very complicated and involves multiple forked packages (and is currently hard to get locally set up). To make it easier for new developers to contribute to graphql-playground the build setup should be a simple as possible.

[morajabi]

@schickling I'd like to do this! Since I have a fair amount of experience with styled-components and I'm part of the team too.

[schickling]

This will involve a fair amount of work @morajabi but this would be absolutely great!