Yarn v2 nested workspaces feature and develoment against local Theia

There is a new yarn on the horizon which should support nested workspaces! https://yarnpkg.github.io/berry/features/workspaces It would basically mean that we can develop custom products against local version of Theia. Interesting whether anyone tried to setup it already and see how well it works.

[original thread by Anton Kosyakov]