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Rewritten "ZHA exception and deviation handling" explanation for readability. (#14960)

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@ -40,9 +40,11 @@ There is also support for grouping of lights, switches, and fans (i.e. support f
## ZHA exception and deviation handling
Zigbee devices that deviate from or do not fully conform to the standard specifications set by the [Zigbee Alliance](https://zigbeealliance.org) may require the development of custom [ZHA Device Handlers](https://github.com/dmulcahey/zha-device-handlers) (ZHA custom quirks handler implementation) for all their functions to work properly with the ZHA integration in Home Assistant. These ZHA Device Handlers for Home Assistant can thus be used to parse custom messages to and from Zigbee devices.
The ZHA implementation in Home Assistant relies on a library called "[ZHA Device Handlers](https://github.com/zigpy/zha-device-handlers)" to resolve issues with Zigbee devices that do not fully conform with the Zigbee standards. The few devices that deviate from the Zigbee specifications set by the [Zigbee Alliance](https://zigbeealliance.org) may therefore require proper bug reports with debug logs from users to assistant the developers in writing custom [ZHA Device Handlers](https://github.com/zigpy/zha-device-handlers/blob/dev/README.md) for all of a device functions to work properly with the ZHA integration.
The custom quirks implementations for zigpy implemented as ZHA Device Handlers for Home Assistant are a similar concept to that of [Hub-connected Device Handlers for the SmartThings Classics platform](https://docs.smartthings.com/en/latest/device-type-developers-guide/) as well as that of [Zigbee-Shepherd Converters as used by Zigbee2mqtt](https://www.zigbee2mqtt.io/how_tos/how_to_support_new_devices.html), meaning they are each virtual representations of a physical device that expose additional functionality that is not provided out-of-the-box by the existing integration between these platforms.
Such a custom "ZHA Device Handler" are Python scripts that internally is also referred to as a "quirk" because they fix "quirks" as in deviations from the standard specifications. ZHA Device Handles do this by transparently acting as a translator, translating and converting non-compliant device messages and instead present them to the application as coming from a virtual compliant device. These ZHA Device Handlers for Home Assistant can thus be used to parse custom messages to and from Zigbee devices. The ZHA Device Handlers that are made can then be reused by all users in future versions of Home Assistant.
The custom quirks implementations for zigpy implemented as ZHA Device Handlers for Home Assistant are a similar concept to that of [Hub-connected Device Handlers for the SmartThings Classics platform](https://docs.smartthings.com/en/latest/device-type-developers-guide/) as well as that of [Zigbee-Herdsman Converters (formerly Zigbee-Shepherd Converters) as used by Zigbee2mqtt](https://www.zigbee2mqtt.io/how_tos/how_to_support_new_devices.html), meaning they are each virtual representations of a physical device that expose additional functionality that is not provided out-of-the-box by the existing integration between these platforms.
## Compatible hardware