convert SimpleFOCRegisters from singleton to namespace to save memory when unused

[Moddingear]

This saves 3328B of flash.

Also telemetry can no longer be a friend of SimpleFOC register so it gets it's own call for size and register printing.

[github-actions]

Memory usage change @ 15cec35

Board	flash	%	RAM for global variables	%
adafruit:samd:adafruit_metro_m4	💚 -3408 - -3392	-0.67 - -0.67	N/A	N/A
rp2040:rp2040:rpipico	💚 -2916 - -2908	-0.14 - -0.14	💚 -40 - -36	-0.02 - -0.01
arduino:sam:arduino_due_x	💚 -4268 - -4252	-0.81 - -0.81	N/A	N/A
arduino:samd:nano_33_iot	💚 -2828 - -2828	-1.08 - -1.08	💚 -28 - -28	-0.09 - -0.09
esp32:esp32:esp32	💚 -4144 - -3892	-0.32 - -0.3	💚 -24 - -24	-0.01 - -0.01
esp32:esp32:esp32s2	💚 -3892 - -3832	-0.3 - -0.29	💚 -24 - -24	-0.01 - -0.01
STMicroelectronics:stm32:GenF1:pnum=BLUEPILL_F103C8	💚 -3228 - -3224	-4.93 - -4.92	💚 -24 - -24	-0.12 - -0.12
STMicroelectronics:stm32:Nucleo_64:pnum=NUCLEO_F411RE	💚 -3328 - -3320	-0.63 - -0.63	💚 -24 - -24	-0.02 - -0.02

Click for full report table

Board	examples/drivers/drv8316/drv8316_3pwm flash	%	examples/drivers/drv8316/drv8316_3pwm RAM for global variables	%	examples/drivers/drv8316/drv8316_6pwm flash	%	examples/drivers/drv8316/drv8316_6pwm RAM for global variables	%	examples/encoders/calibrated_sensor/calibration_save flash	%	examples/encoders/calibrated_sensor/calibration_save RAM for global variables	%	examples/encoders/linearhall flash	%	examples/encoders/linearhall RAM for global variables	%	examples/encoders/mt6816/mt6816_spi flash	%	examples/encoders/mt6816/mt6816_spi RAM for global variables	%	examples/encoders/calibrated_sensor/calibrated flash	%	examples/encoders/calibrated_sensor/calibrated RAM for global variables	%
adafruit:samd:adafruit_metro_m4	-3392	-0.67	N/A	N/A	-3392	-0.67	N/A	N/A	-3392	-0.67	N/A	N/A	-3408	-0.67	N/A	N/A	-3408	-0.67	N/A	N/A
rp2040:rp2040:rpipico	-2916	-0.14	-36	-0.01	-2916	-0.14	-36	-0.01	-2908	-0.14	-36	-0.01	-2916	-0.14	-40	-0.02	-2908	-0.14	-36	-0.01
arduino:sam:arduino_due_x	-4264	-0.81	N/A	N/A	-4264	-0.81	N/A	N/A	-4260	-0.81	N/A	N/A	-4268	-0.81	N/A	N/A	-4252	-0.81	N/A	N/A
arduino:samd:nano_33_iot	-2828	-1.08	-28	-0.09	-2828	-1.08	-28	-0.09	-2828	-1.08	-28	-0.09	-2828	-1.08	-28	-0.09	-2828	-1.08	-28	-0.09
esp32:esp32:esp32	-4144	-0.32	-24	-0.01	-4072	-0.31	-24	-0.01	-3916	-0.3	-24	-0.01					-3892	-0.3	-24	-0.01
esp32:esp32:esp32s2	-3840	-0.29	-24	-0.01	-3840	-0.29	-24	-0.01	-3832	-0.29	-24	-0.01	-3832	-0.29	-24	-0.01	-3892	-0.3	-24	-0.01
STMicroelectronics:stm32:GenF1:pnum=BLUEPILL_F103C8	-3224	-4.92	-24	-0.12	-3228	-4.93	-24	-0.12	-3224	-4.92	-24	-0.12	-3224	-4.92	-24	-0.12
STMicroelectronics:stm32:Nucleo_64:pnum=NUCLEO_F411RE	-3324	-0.63	-24	-0.02	-3328	-0.63	-24	-0.02	-3328	-0.63	-24	-0.02	-3320	-0.63	-24	-0.02	-3328	-0.63	-24	-0.02	-3328	-0.63	-24	-0.02

Click for full report CSV

Board,examples/drivers/drv8316/drv8316_3pwm<br>flash,%,examples/drivers/drv8316/drv8316_3pwm<br>RAM for global variables,%,examples/drivers/drv8316/drv8316_6pwm<br>flash,%,examples/drivers/drv8316/drv8316_6pwm<br>RAM for global variables,%,examples/encoders/calibrated_sensor/calibration_save<br>flash,%,examples/encoders/calibrated_sensor/calibration_save<br>RAM for global variables,%,examples/encoders/linearhall<br>flash,%,examples/encoders/linearhall<br>RAM for global variables,%,examples/encoders/mt6816/mt6816_spi<br>flash,%,examples/encoders/mt6816/mt6816_spi<br>RAM for global variables,%,examples/encoders/calibrated_sensor/calibrated<br>flash,%,examples/encoders/calibrated_sensor/calibrated<br>RAM for global variables,%
adafruit:samd:adafruit_metro_m4,-3392,-0.67,N/A,N/A,-3392,-0.67,N/A,N/A,-3392,-0.67,N/A,N/A,-3408,-0.67,N/A,N/A,-3408,-0.67,N/A,N/A
rp2040:rp2040:rpipico,-2916,-0.14,-36,-0.01,-2916,-0.14,-36,-0.01,-2908,-0.14,-36,-0.01,-2916,-0.14,-40,-0.02,-2908,-0.14,-36,-0.01
arduino:sam:arduino_due_x,-4264,-0.81,N/A,N/A,-4264,-0.81,N/A,N/A,-4260,-0.81,N/A,N/A,-4268,-0.81,N/A,N/A,-4252,-0.81,N/A,N/A
arduino:samd:nano_33_iot,-2828,-1.08,-28,-0.09,-2828,-1.08,-28,-0.09,-2828,-1.08,-28,-0.09,-2828,-1.08,-28,-0.09,-2828,-1.08,-28,-0.09
esp32:esp32:esp32,-4144,-0.32,-24,-0.01,-4072,-0.31,-24,-0.01,-3916,-0.3,-24,-0.01,,,,,-3892,-0.3,-24,-0.01
esp32:esp32:esp32s2,-3840,-0.29,-24,-0.01,-3840,-0.29,-24,-0.01,-3832,-0.29,-24,-0.01,-3832,-0.29,-24,-0.01,-3892,-0.3,-24,-0.01
STMicroelectronics:stm32:GenF1:pnum=BLUEPILL_F103C8,-3224,-4.92,-24,-0.12,-3228,-4.93,-24,-0.12,-3224,-4.92,-24,-0.12,-3224,-4.92,-24,-0.12,,,,
STMicroelectronics:stm32:Nucleo_64:pnum=NUCLEO_F411RE,-3324,-0.63,-24,-0.02,-3328,-0.63,-24,-0.02,-3328,-0.63,-24,-0.02,-3320,-0.63,-24,-0.02,-3328,-0.63,-24,-0.02,-3328,-0.63,-24,-0.02