Add internalTemperature to KamereonVehicleHvacStatusData

[StefCoene]

Summary

• Add internalTemperature: float | None field to KamereonVehicleHvacStatusData dataclass
• Display it in the CLI status output alongside externalTemperature

The hvac-status endpoint returns internalTemperature for at least the Scenic E-Tech (confirmed with real vehicle data). The field is optional (None) so it is silently skipped for vehicles that do not return it, consistent with how externalTemperature is handled.

Test plan

• Run renault-api --log status on a vehicle that returns internalTemperature and verify it shows up
• Verify that vehicles without internalTemperature still show status without errors

🤖 Generated with Claude Code

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 87.03%. Comparing base (1498c3a) to head (fa64d34).
⚠️ Report is 3 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #2031   +/-   ##
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  Coverage   87.03%   87.03%           
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  Files          34       34           
  Lines        2159     2159           
  Branches      248      248           
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  Hits         1879     1879           
  Misses        198      198           
  Partials       82       82           

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[epenet]

Thanks @StefCoene