Different React versions in isolation - example

[alex-vukov]

I needed this implementation for a project I work on so I decided I could add this as an example here in case someone else needs it. This example will render two apps - Host and Remote with different react versions without any shared libraries and in isolation between them.

[CLAassistant]

All committers have signed the CLA.

[ScriptedAlchemy]

please add reference to main readme so others can get an idea of what it does

[alex-vukov]

@ScriptedAlchemy thank you for the review! I updated the main Readme with a reference to the new example Readme.md.