Support 3rd party VSCode extensions #3

Any plans to bring VSCode extensions to stackblitz?

Having vim keyboard bindings would be great, as well as other extensions like vscode-styled-components for syntax highlighting of styled-components strings, prettier formatting, etc.

Currently codesandbox.io has Vim and Prettier support, but it seems like having VSCode extension support would open up a lot of functionality, but I'm sure some extensions could not be supported.