A new platform for controlling Monoprice 6-Zone amplifier (#9662)

* added implementation for monoprice 6-zone amplifier. This implementation is based on and very similar to russoun_rnet implementaion

* updated comments and cleaned up code

* updated comments and cleaned up code

* added unit tests

* removed 'name' attribute from platform schema.

* added monoprice.py to .coveragerc

* fixed lint

* fixed lint errors

* fixed lint errors

* added monoprice to requirements_all.txt

* fixed lint errors again

* implemented change requests

* fixed lint error

* added exception handling to setup_platform()

* replaced catchall with SerialException only

* added myself to CODEOWNERS

* fixed weird merge to CODEOWNERS