[platform] Waveshare ESP32-C6-LCD-1.47

[ddrcode]

Well, in short - try to run in on any ESP32-C6, without Waveshare's additions, like the screen.
But in general it may be an interesting platform to work on.

Some resources:

• Waveshare's product page (with resources)
• Espresif documentation page for C6
• ESP32C6 blinky in asm
• ESP32-C6-DevKitC-1 v1.2

[ddrcode]

There is a comment on Amazon about screen brightness — I copy-paste it here, just in case, but my quick test of a device doesn't show any issues with the brightness

Instead of using the Waveshare examples I just loaded up the demo from the Adafruit_ST7789 library. I have seen others online complain about the display always remaining black. All that I had to do was bring the backlight pin GPIO_22 high and the display lit up right away. This pin can also be tied to 3v3 if you like to always keep the backlight on. The display size is small but it is clear and easy to read. I will buy again if another project needs this form factor.