Add Tuya thermostat _TZE200_6kijc7nd

[semolex]

Proposed change

Additional information

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 91.04%. Comparing base (2fd3586) to head (7b0823b).
Report is 11 commits behind head on dev.

Additional details and impacted files

@@           Coverage Diff           @@
##              dev    #3952   +/-   ##
=======================================
  Coverage   91.04%   91.04%           
=======================================
  Files         331      331           
  Lines       10698    10702    +4     
=======================================
+ Hits         9740     9744    +4     
  Misses        958      958           

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