examples/direct gpio: remove count variable

count variable does not do anything

Signed-off-by: Amitesh Singh <singh.amitesh@gmail.com>

Add MAX7219 SPI display driver library + example and small SPI library fixes

Added ST77xx color LCD example

SPI lib: fixed bugs discovered by JKT

Update standby examples and add implementation notes.

fix the adc trigger settings

added all examples to platformio

to keep platformio projects in sync with the examples folders, I added missing ones in alphabetical order.

Add warning message if WCH-LinkE is detected in ARM mode

Make top comment section match project.

Make it so minichlink will automatically try to get found if you have and have linked a ch32v003fun repository

Update with nulled printf (to prevent warnings on non-printf projects) and undestructively add interrupt nesting to WS2812B driver.