I2C reclock guard - avoid gazillion calls to reclock on SENXX sensors (#11412)

* Add SEN6X

* Adds new SENXX class for SEN5X and SEN6X
* Adds CO2 sensor calibration class to be shared among othre CO2 sensors

* Make existing CO2 sensor draw from CO2Sensor class

* Minor coment for CO2 sensor class

* Move away from getRTC in SENXX class to keep track of time changes.

* Change all sensors to millis for tracking time, instead of using getRTC

* Add comments regarding VOC state

* Avoid storing non-valid RTC

Co-authored-by: coderabbitai[bot] <136622811+coderabbitai[bot]@users.noreply.github.com>

* Avoid CO2 sensor warm-up time to be below PM measured started

Co-authored-by: coderabbitai[bot] <136622811+coderabbitai[bot]@users.noreply.github.com>

* Fix limits in CO2 sensor calibration

Co-authored-by: coderabbitai[bot] <136622811+coderabbitai[bot]@users.noreply.github.com>

* Add pragma once on headers

* Avoid non-working ASC commands

Co-authored-by: coderabbitai[bot] <136622811+coderabbitai[bot]@users.noreply.github.com>

* Fix data poll

* Move pm measure started before warmup check

* Make cleaning non-blocking

* Restore previous state if cleaning fails. Fix data ready condition.

* Fix CO2 sensor checks for calibration

* Add ReClockI2C guard to simplify calls to Reclock. Make SENXX calls to reclock outside of readBuffer, to avoid bizillion calls

* Add new reClockGuard to all sensor classes that require it

* Make clock guard store values on each construction and restore them directly

* Reduce log messages

* Update ADS1X15 to new guard

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Co-authored-by: coderabbitai[bot] <136622811+coderabbitai[bot]@users.noreply.github.com>

src/modules/Telemetry/Sensor/SENXXSensor.h

@@ -255,6 +255,11 @@ class SENXXSensor : public TelemetrySensor, public CO2CalibrationSensor
     bool readPNValues(bool cumulative);
     bool readValues();
 
+    // Actual wakeUp() logic, factored out so handleAdminMessage() can resume
+    // measurement after a calibration pause without nesting a second I2C-clock
+    // guard inside its own (see ReClockI2CGuard's reentrancy note).
+    uint32_t wakeUpInternal();
+
     // Monotonic (millis()) timers for warmup/poll intervals. Deliberately not
     // wall-clock (getTime()) based: getTime() can jump discontinuously the moment the RTC
     // quality improves mid-session (see checkRTCQualityImproved()), which would corrupt