PCB：将原理图digi_3V3.SchDoc添加至PCB文件nir_usb.PrjPcb

  新建原理图digi_3V3时忘记添加至nir_usb.PrjPcb工程文件中

Signed-off-by: fanhx <fanfhx@163.com>
PCB：添加空白原理图模板digi_5V.SchDoc

Signed-off-by: fanhx <fanfhx@163.com>
PCB:完成原理图digi_5V.SchDoc

    完成了芯片TPS5430外围电路的设计，电阻电容大小已标示，序号未标示，并将原理图添加至工程中

Signed-off-by: fanhx <fanfhx@163.com>