Summary:
This diff removes most remaining Electron imports, by storing env and path constants on the RenderHost. As nice side effect those paths are all cached now as well.
To make sure RenderHost is initialised before Flipper itself, forced loading Flipper through a require. Otherwise the setup is super sensitive to circular import statements, since a lot of module initialisation code depends on those paths / env vars.
Reviewed By: nikoant
Differential Revision: D31992230
fbshipit-source-id: 91beb430902272aaf4b051b35cdf12d2fc993347
2e7015388c