[BUG] Aqara E1 TRV thermostat quirk does not expose external temperature input

[mwhapples]

Bug description

The Aqara E1 TRV allows sending it a external temperature sensor reading. The existing quirk in zhaquirks/xiaomi/aqara/thermostat_agl001.py does not expose this functionality. An example of how this should be sent can be found in zigbee-herdsman-converters and the functionality from that does work in zigbee2mqtt. It would be good if this functionality could be added to the quirk so it can be used with ZHA.

Steps to reproduce

In home-assistant, view details of the Aqara E1 device. Look through entities exposed. See that external temperature input is not exposed.

Expected behavior

The external temperature input should be exposed and when set it should send the value to the Aqara E1 TRV.

Screenshots/Video

Screenshots/Video

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Device signature

Device signature

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Diagnostic information

Diagnostic information

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Logs

Logs

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Additional information

Refer to zigbee-herdsman-converters for a working implementation of this feature.