Add support for custom cluster definition (as part of device definition)

[LaurentChardin]

Is your feature request related to a problem? Please describe. There is an ongoing development in z2m to enable custom cluster definition at the device definition and have them decoupled from the zh lib.

However as sjorge pointed out, the z2m-frontend also has a static dependency on those libs. Once the change lands in z2m and people start to migrate cluster definitions out of zh, they will loost the visibility in the UI:

• In the dev tab, the cluster dropdown would not contain the custom cluster name nor the cluster ID

This request is to start a change in order to support the upcoming changes : https://github.com/Koenkk/zigbee-herdsman/pull/1019

Describe the solution you'd like In the future, there will be standard cluster definition in ZH (+legacy ones) and new cluster definitions in ZHC (carried directly at the device level).

We can either:

• Implement the same logic than z2m in merging the definitions depending on the device currently used
• Remove completely the dependency on zh/zhc and request the device definition on the fly to z2m (and let him do the merge) -> preferred option

[Suxsem]

Hi, any progress on this one? Thank you!

[LaurentChardin]

@nurikk Hope if you could help with the latest commit : at least to trigger the build.

[LaurentChardin]

Merged into 0.7.0