Summary: This blesses the `Layout` and `theme` components and exposes them from `flipper-plugin`, so that they can be used in (public) Sandy plugins. Also marked old abstractions as going to be deprecated.
Reviewed By: cekkaewnumchai
Differential Revision: D24503560
fbshipit-source-id: a8f384667b8f66e3b9f00771a123fe5c9d755eb3
Summary:
1) moved "sonar/desktop/src" to "sonar/desktop/app/src", so "app" is now a separate package containing the core Flipper app code
2) Configured yarn workspaces with the root in "sonar/desktop": app, static, pkg, doctor, headless-tests. Plugins are not included for now, I plan to do this later.
Reviewed By: jknoxville
Differential Revision: D20535782
fbshipit-source-id: 600b2301960f37c7d72166e0d04eba462bec9fc1
