Summary: Flipper plugins fail when importing css from third-party dependencies. This diff tries to fix that. Effectively, the plugin can import the css and export it when is bundled. When we load the plugin, we check if there's a css file for it. If there's one, we return it and try to use it. Reviewed By: aigoncharov Differential Revision: D40758178 fbshipit-source-id: e53afffcc481504905d5eeb1aea1f9114ee2a86b
flipper-ui-core (TBD)
Flipper's UI, agnostic of Electron vs Browser.