Migrate the lerna workspace to Nx

[sjimenez77]

I am convinced that a Nx workspace monorepo is definitely much better than lerna for many reasons.

Anyhow, here there is an interesting article (from Nrwl) that points out the benefits https://blog.nrwl.io/migrating-from-lerna-to-nx-better-dev-ergonomics-much-faster-build-times-da76ff14ccbb