Update README with real examples

[vileen]

It would be nice to add some real-world examples of issues that this repository solves.
Right now, based on the description, and example configurations I have no idea how to use this package and I think it might solve my problem when set up correctly.

[Andarist]

A real-world example can be found here:
https://github.com/davidkpiano/xstate/blob/19b0a22d8cb0023e2bdf7830169d1594f96e63f3/packages/xstate-react/jest.config.js#L5

I make this package to resolve its dependencies from the monorepo to resolve to respective src directories