Add new target for HGLRCF405V2

[HGLRC-T]

A new target configuration for HGLRCF405V2 from HGLRC.

The flight controller uses the STM32F405 as the controller. It features a single gyroscope but is available in versions with different gyroscope models.

Added files: CMakeLists.txt, target.c, target.h

Any and all feedback is appreciated.