Add SD card connector info to F103ZE board

[Bob-the-Kuhn]

Here's a JSON for the F103ZE board that adds the SD card connector.

STM32F103ZET6-F103ZE-Board.zip

I'm happy to report that it can operate in either SDIO or SPI mode. Unfortunately the SD detect pin was not connected.

[Bob-the-Kuhn]

Here's the schematic for the board.

STM32F103ZE核心板--原理图-1807M.pdf

[ThomasGravekamp]

Thanks, I will try to look into this.