Merge branch 'esp32-hfi-flux_observer' into esp32_copper_hfi-temp #25

Job	Run time
lint	8s
Test compiling (arduino:avr:uno)	1m 11s
Test compiling (arduino:sam:arduino_due_x)	24s
Test compiling (arduino:avr:mega)	21s
Test compiling (arduino:avr:leonardo)	17s
Test compiling (arduino:samd:nano_33_iot)	40s
Test compiling (adafruit:samd:adafruit_metro_m4)	1m 3s
Test compiling (esp32:esp32:esp32doit-devkit-v1)	4m 14s
Test compiling (esp32:esp32:esp32s2)	2m 8s
Test compiling (esp32:esp32:esp32s3)	2m 58s
Test compiling (STMicroelectronics:stm32:GenF1:pnum=BLUEPILL_F103C8)	1m 13s
Test compiling (STMicroelectronics:stm32:Nucleo_64:pnum=NUCLEO_F411RE)	2m 3s
Test compiling (STMicroelectronics:stm32:GenF4:pnum=GENERIC_F405RGTX)	1m 8s
Test compiling (STMicroelectronics:stm32:GenL4:pnum=GENERIC_L475RGTX)	2m 16s
Test compiling (STMicroelectronics:stm32:Disco:pnum=B_G431B_ESC1)	40s
Test compiling (arduino:mbed_rp2040:pico)	28s
	21m 12s

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