* Move ESPHomeManager into its own file
This is not a functional change. This is only a reorganization
ahead of some more test coverage being added so moving tests
around can be avoided later.
* relos
* fixes
* merge a portion of new cover since its small and allows us to remove the __init__ from .coveragerc
* ESPHome: Use MAC as unique ID
* Normalize incoming zeroconf/dhcp macs
* Update comment
* Test ESPHome without mac in zeroconf
* Use format_mac
* Remove unique ID index from DomainData
