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Add Arduino Nano Connect setup example 62

Original Adafruit button rendering code can be used with an external font class if "textFont" is set to 255.

See #1536

Add example user setup 61

The RP2040 processors can now drive 8 bit parallel and SPI displays using the PIO hardware.

The PIO offloads the processor by providing:
1. PIO managed setWindow sequence
2. PIO managed block and screen fill

The RP2040 can now be used with 8 bit parallel TFT interface displays. DMA is also supported for both SPI and 8 bit parallel displays.

Reduce SPI read clock frequency to avoid bit errors on reading CGRAM.