Added const to stmdev_write_ptr

Main changes:

• Reorganized repository structure in subumodules
• Added const to stmdev_write_ptr #121

Fixed:

• iis2dlpc: fixed lsb_to_celsius #125
• lis25ba: fixed uninit var use in bus_mode_set #126
• lsm9ds1: fixed magnetometer interrupt latch mode #124
• lsm6dso: fixed _sh_data_rate_set/get #128
• lsm6dso32: fixed _sh_data_rate_set/get #128

New:

• lsm6dso32x
• lis2dh

Added big/little endianness management

New:

• lps22ch
• lps27hhtw
• ais2ih

Fixed:

• ism303dac
• lsm6dsr
• lsm6dsrx
• lsm6dsox
• lsm6dso
• ism330dhcx
• lsm6dsm
• stts22h
• lsm6dso32
• iis2iclx
• ism330dhcx
• ism330dlc
• lis2dtw12
• lis2dw12

Updated:

• all submodules
• files .ioc
• iis2iclx
• lsm6dsrx
• lsm6dsox
• lsm6dso

New devices added

New:
 - h3lis100dl
 - iis2iclx
 - lis25ba
 - lis3dsh
 - lsm6dsrx
 - lsm6dso32
 - lps33k
 - stts22h

Fixed:
 - _resources/FIFO_decompression_utility/
 - asm330lhh
 - ais2dw12
 - hts221
 - ism330dac
 - lis2dw12
 - lis2dtw12
 - lis2de12
 - lsm9ds1
 - lsm6dso
 - lsm6dsox
 - lps25hb

Updated:
 - submodule STMems_Finite_State_Machine
 - submodule STMems_Machine_Learning_Core
 - iis2dh
 - iis3dwb
 - ism330dhcx
 - i3g4250d
 - h3lis331dl
 - lps22hh
 - lsm6dsr
 - lsm6dsrx

Endianness support:
 - ais2dw12
 - a3g4250d
 - ais328dq
 - ais3624dq
 - asm330lhh
 - ais2dw12
 - h3lis100dl
 - h3li331dl
 - hts221
 - iis2iclx
 - iis3dwb
 - iis2mdc
 - iis2dlpc
 - iis2dh
 - iis328dq
 - iis3dhhc
 - ism330dhcx
 - i3g4250d
 - ism303dac
 - ism330dlc
 - l20g20is
 - l3gd20h
 - lis2dtw12
 - lis2dw12
 - lis2ba
 - lis2de12
 - lis2mdl
 - lis2dh12
 - lis2ds12
 - lis2hh12
 - lps22hh
 - lps27hhw
 - lsm6dsrx