Implements Saswell TRV quirk and tests (Tuya device)

[Elyasin]

Proposed change

Implements Saswell TRV quirk and tests (Tuya device)

Additional information

This is an implementation of the quirk that I believe many use, but it has not been made a PR for this yet.
The device variants are Saswell_TZE200 and Saswell_TYST11. Tests are written and I use it since months in my setup with Home Assistant.

A screen shot of such a TRV device variant:
You can see:

• anti freeze (hidden; on)
• away mode (hidden: off)
• thermostat
• limescale protection (hidden; on)
• child lock (hidden; on)
• temperature calibration
• window open detection (deactivated)
• schedule mode (deactivated)

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

Attention: Patch coverage is 89.80583% with 21 lines in your changes missing coverage. Please review.

Project coverage is 90.20%. Comparing base (56001dd) to head (e98f420).

Files with missing lines	Patch %	Lines
zhaquirks/tuya/ts0601_trv.py	89.80%	21 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##              dev    #3468      +/-   ##
==========================================
+ Coverage   89.84%   90.20%   +0.35%     
==========================================
  Files         322      321       -1     
  Lines       10371    10476     +105     
==========================================
+ Hits         9318     9450     +132     
+ Misses       1053     1026      -27     

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