Generic ZHA Zeroconf discovery

[puddly]

Proposed change

I'm introducing a new service type: _zigbee-gateway._tcp.local.. This will allow all future TCP coordinators to be supported without an explicit PR to ZHA. The only expected properties are radio_type (one of ezsp, znp, etc.) and serial_number (must be unique per device). The service name will be shown as-is.

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• [ ] Dependency upgrade
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• [ ] Code quality improvements to existing code or addition of tests

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• This PR fixes or closes issue: fixes #
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[puddly]

CC @tube0013

[puddly]

@Hedda In the future, please do not ask other projects to implement draft PRs. This code isn't done or in a final form and now I have to communicate with other developers to change the schema.

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Please take a look at the requested changes, and use the Ready for review button when you are done, thanks :+1:

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[puddly]

Thanks for the review! I've addressed both comments and reworked unit tests to properly increase coverage.

[bdraco]

Maybe register it here as well https://www.iana.org/form/ports-services

[puddly]

@bdraco ah, good point. It's already registered but there's no info about what keys are allowed, nor any public references to devices actually using it 😅.

I'll see what I can dig up.

[puddly]

Marking as draft until I hear back from a few people. If there's an existing and active registration we'll have to rename this. If not, we'll continue with this name.

[puddly]

_zigbee-gateway's format is undocumented and I'm unable to get any information about it. I'm moving to _zigbee-coordinator to avoid issues down the line.

[puddly]

Looks like CI is having some issues right now. Thanks for the review, @abmantis. I think I've addressed your review comments.