Merge branch 'low_bit_support' into 'dev'

Low bit support

See merge request !16

aidge_export_arm_cortexm/boards/stm32/F7/Drivers/STM32F7xx_HAL_Driver/LICENSE.txt

+This software component is provided to you as part of a software package and
+applicable license terms are in the  Package_license file. If you received this
+software component outside of a package or without applicable license terms,
+the terms of the BSD-3-Clause license shall apply. 
+You may obtain a copy of the BSD-3-Clause at:
+https://opensource.org/licenses/BSD-3-Clause