Update React Native DWN tests and automate in our CI

[leordev]

First part of the work required on #9

• The default web5 connect does not work out of the box for RN, we need to implement an user agent for it.
• I needed to duplicate the util folder with our shared tests because RN was not allowing me to import external file from the root

This PR does the groundwork to allow us to test RN and add it to our CI, but we need some follow up to complete the react native work:

• Convert from yarn to pnpm to keep the repo packages
• Make sure to reuse the util scripts -- or create an automation to copy the functions from there in a pre-install script
• Implement a basic agent to allow web5 testing

I did not want to do it all in this PR to facilitate the review and work in incremental steps. I will create issues for all of the above!