Add/extract firmware version

[mkmer]

Description:

Extract firmware version keys for HA device information.

Related issue (if applicable): fixes #

Checklist:

• Local tests with tox run successfully PR cannot be meged unless tests pass
• Changes tested locally to ensure platform still works as intended
• Tests added to verify new code works

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (864de67) 99.86% compared to head (049d151) 99.86%.

Additional details and impacted files

@@           Coverage Diff           @@
##              dev     #842   +/-   ##
=======================================
  Coverage   99.86%   99.86%           
=======================================
  Files           8        8           
  Lines        1460     1464    +4     
=======================================
+ Hits         1458     1462    +4     
  Misses          2        2           

Flag	Coverage Δ
unittests	99.86% <100.00%> (+<0.01%)	⬆️

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