feat: Add experimental Ember adapter

[Koenkk]

TODO

• Merge New ember adapter implementation targeting EZSP 13 and above zigbee-herdsman#918
• Create discussion

CC: @Nerivec

[Nerivec]

I'll also see about writing some docs for io for anything relevant to this. Let me know where you think is best to put it. (single page as a subcategory to https://www.zigbee2mqtt.io/guide/adapters/ ?)

[Koenkk]

Let's first test it for a few weeks, then we can add it to zigbee2mqtt.io