Fix bug in exFAT read()

Correct handling of the exFAT fields validLength and dataLength.

Support for RP2040 built-in SDIO socket, PIO clock divisor option

Add RP2040/RP2350 SDIO, bug fixes

Move constructor and move assignment operator for file classes.

Move constructor and move assignment operator for file classes.
SdFatConfig.h options for file constructors and destructors.

Support missing MBR, bug fixes. new features

Support missing MBR, bug fixes. new features

Fixes, new RingBuf, SPI array options, clang-format source

Fix SPI sleep/idle problem, update copyright

Improve initialization of older cards

Add Volume begin by start sector for Teensy