feat: Flysky Noble 4 Plus (NB4+) support

[richardclli]

Flysky Noble 4 Plus (NB4+) Support

Development progress:

• LCD drver
• touch driver
• ST, TH
• pots
• switches
• trims
• encoder (the hardware has 2 encoders, once mapped one currently, need some input to how to make use 2nd encoder)
• audio
• battery charging
• internal module (STM32F030 MCU nothing good can be supported)
• external module (Bluetooth USART3 port, mapped as internal module that can support MULTI/AFHDS3/CRSF)
• modding documentation https://github.com/EdgeTX/edgetx/wiki/Flysky-NB4--Hardware-Mod-for-Complete-EdgeTX-Support

Known hardware limitations:

1. No on board RTC support, missing battery and a few cap, diode, crystal components. (PL18 is a lot simpler, just need to add a battery)
2. NOR flash is small (Only 8MB on board, can change the chip to maximum 128MB, same as PL18 mod)
3. DAC sound output work out of the box without modding ^.^