Add Tuya motion sensor _TZE200_agumlajc quirk

[ausfas]

Proposed change

This PR adds a custom quirk for the Mercator Ikuü TS0601 Motion Sensor (_TZE200_agumlajc), which is a Tuya-based combination sensor.

The quirk enables full functionality for:

• Occupancy (motion) detection using DP104
• Temperature (DP1)
• Humidity (DP2)
• Illuminance (DP101)
• Motion timeout / fade time setting
• Sensitivity, distance, and other optional datapoints

The quirk was developed using the TuyaQuirkBuilder framework, and tested successfully with ZHA in Home Assistant on firmware 0x00000042.

Additional information

This device previously paired but was non-functional under ZHA without a quirk. The implementation uses datapoint references confirmed via Zigbee2MQTT and verified manually through ZHA logs and testing.

This is a non-breaking addition and does not interfere with other Tuya TS0601-based devices.

Let me know if naming or structure adjustments are needed to align with ZHA device handler conventions.

Checklist

• The changes are tested and work correctly
• pre-commit checks pass / the code has been formatted using Black
• Tests have been added to verify that the new code works

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 91.20%. Comparing base (e4844d4) to head (64f12af).
Report is 7 commits behind head on dev.

Additional details and impacted files

@@            Coverage Diff             @@
##              dev    #4027      +/-   ##
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+ Coverage   91.17%   91.20%   +0.02%     
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  Files         334      335       +1     
  Lines       10858    10891      +33     
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+ Hits         9900     9933      +33     
  Misses        958      958              

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[TheJulianJES]

I think we should put this in the tuya_motion.py file instead.
We've generally started using the tuya_ prefix for files containing Tuya v2 quirks.
Other similar motion quirks are already in that file as well.

And TS0601 is used by basically all Tuya devices unfortunately (from dimmers to thermostats, ...).

[TheJulianJES]

Due to HA naming conventions, please only capitalize the first word, i.e. this should be "Brightness threshold" for the fallback_name (which will be the basis for US English translations when it's merged into HA).
Please also change the other names.

[TheJulianJES]

This is not wrong, but instead of directly mapping a Tuya dp to a v2 quirk entity, we've generally mapped the dp to a (fake) ZCL attribute on the IasZone cluster or the OccupancySensing cluster using TuyaOccupancySensing or TuyaMotionWithReset in tuya_motion.py, then mapping the dp with tuya_dp. See the examples in that file.
We may want to follow that here as well (and/or even introduce a tuya_motion method at some point instead).

[ausfas]

Thanks @TheJulianJES! I’ve:

Moved the quirk into tuya_motion.py alongside similar Tuya motion devices

Replaced low-level .tuya_dp() with .tuya_binary_sensor() for motion DP (104) to align with other Tuya v2 quirks

Standardized fallback names to use sentence-style capitalization

Let me know if anything further is needed.

[ausfas]

Hi @TheJulianJES, do I need to do anything at my end or will you merge this into main branch later ?