* Add support for RAK3112 variant with necessary configurations and definitions
* Add the configuration of the LED pin
* Refactor rak3112 variant configuration: update name, remove unused files,
* Update RAK3112 configuration: refine memory settings, adjust GPS pin definitions
* Update RAK3112 hardware vendor definition to use correct model
* configure LED pins and update module definitions
* Update USB mode configuration for RAK3112 board
* Update power and battery configuration in rak3112 variant
* Cancel the modification of mesh.pb.h
* Rename RAKwireless RAK3112 to RAK3312
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Co-authored-by: daniel <daniel.cao@rakwireless.com>
Co-authored-by: Thomas Göttgens <tgoettgens@gmail.com>
Co-authored-by: Ben Meadors <benmmeadors@gmail.com>
