Release 4.4.3 - Bidirectional I2S, SoftwareSPI

Overview

Minor update that adds a bidirectional I2S interface (input and output using a single BCLK/LRCLK) and a software-based SPI interface to allow SPI connections on any pin.

Peripherals (I2S, SPI)

• Deduplicate SPI and SoftwareSPI routines (#2779)
• Add PIO-based SoftwareSPI enabling SPI on any pins (#2778)
• Add buffer read to AudioBufferManager and I2S (#2777)
• Bi-directional I2S support (#2775)

Infrastructure

• Document PSRAM and Boot2 better (#2792)
• OTA Updater better error codes on OOS (#2793)
• Fix I2C on Adafruit Feather RP2350 HSTX (#2784)
• Don't set SDFAT_FILE_TYPE, default is OK (#2773)