* Added with-mqtt-js example

* Fixed eslint/prettier errors

* Update README.md

* Updated with-mqtt-js to latest next/react versions, WIP: Refactoring useMqtt()

* A2PC

* Working example, unrefactored

* A2PC

* Ran prettier

* Used NEXT_PUBLIC_ prefix instead of keys as props

* Updated readme and added .env.local.example
Co-authored-by: NSebastian König <sebastian_koenig@cotyinc.com>
Co-authored-by: NLuis Alvarez D <luis@vercel.com>