Add CIO call for NOTE and POINT.

Some N: protocols will have support to do random access. NOTE retrieves the current position in the file, while POINT sets the current position within the file.

These pages show the API:
https://github.com/FujiNetWIFI/fujinet-platformio/wiki/N%3A-SIO-Command-%2425---Point-in-File
https://github.com/FujiNetWIFI/fujinet-platformio/wiki/N%3A-SIO-Command-%2426---Note-in-File

As stated in the API, position is specified as a 24-bit integer in little-endian order

For NOTE, the returned value should be returned in ICAX3, ICAX4, and ICAX5.
For POINT, ICAX3, ICAX4, and ICAX5 should be sent to the FujiNet.