[New device support]: thermostat beca BHT-209-GCZB

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Description

Title: New device support: Beca BHT-209-GCZB (TS0601, new manufacturer name)

Hello,

My Beca BHT-209-GCZB thermostat pairs with Zigbee2MQTT but is shown as "Automatically generated definition" instead of the supported BHT-209-GCZB model. No climate entity is created.

- Model ID: TS0601
- Manufacturer name: _TZE2841000000_smcqit2l (exactly as displayed by Zigbee2MQTT)
- Zigbee2MQTT version: 2.14.2 (Home Assistant app)
- Adapter: Sonoff ZBDongle-E, EmberZNet 9.1.1, ember driver
- Device bought at https://www.expert4house.com/fr/ (Beca BHT-209-GCZB, battery Zigbee thermostat with dry contact)

It looks like a new manufacturer name for a model that is already supported (BHT-209-GCZB). Could you please add this fingerprint to the existing definition?

I can provide more logs or test changes if needed.

Thank you!

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