Fan controller task

[mutatrum]

This is a part of #1217 where only the fan controller is extracted. It increased the PID controller frequency from 1.8 seconds to 100ms, which results in a much smoother fan curve. Especially on older devices that uses the EMC2101 internal temp with a 1° C resolution, it's a much more restful soundscape.

I also decreased the PID tuning values quite a bit, but this needs further testing. Maybe the PID parameters need to be exposed under an advanced tab, so people can tune the controller themselves.

[github-actions]

Test Results

41 tests  ±0   41 ✅ ±0   0s ⏱️ ±0s
 1 suites ±0    0 💤 ±0 
 1 files   ±0    0 ❌ ±0 

Results for commit ae612ff. ± Comparison against base commit b797ea7.

♻️ This comment has been updated with latest results.

[0xf0xx0]

auto fan control isnt capped at 100, and will slowly over an hour or two go up to 255 before wrapping around and re-starting the fan

[mutatrum]

auto fan control isnt capped at 100, and will slowly over an hour or two go up to 255 before wrapping around and re-starting the fan

Apparently the PID max output is a soft limit and it can overshoot, reproduced it by setting the temp to 35C. Added clamping of the PID output.