Support 2 or 4 byte float for weather air pressure

[farmio]

Description

Fixes # (issue)

Type of change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Code quality improvements to existing code or addition of tests

Checklist

• The documentation has been adjusted accordingly
• Tests have been added that prove the fix is effective or that the feature works
• The changes are documented in the changelog (docs/changelog.md)

[codecov]

Codecov Report

Attention: Patch coverage is 95.65217% with 2 lines in your changes missing coverage. Please review.

Project coverage is 96.92%. Comparing base (bf9b26a) to head (dcd7c82).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
xknx/remote_value/remote_value_by_length.py	95.34%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1618      +/-   ##
==========================================
- Coverage   96.92%   96.92%   -0.01%     
==========================================
  Files         159      160       +1     
  Lines       10643    10688      +45     
==========================================
+ Hits        10316    10359      +43     
- Misses        327      329       +2     

Files with missing lines	Coverage Δ
xknx/devices/weather.py	100.00% <100.00%> (ø)
xknx/remote_value/__init__.py	100.00% <100.00%> (ø)
xknx/remote_value/remote_value_by_length.py	95.34% <95.34%> (ø)