Import YEEP-144 library 1.2 sources

Source-only snapshot of the 1.2 release. Drivers/ (the vendored ST HAL and
CMSIS) is excluded at 173 MB; fetch it from STMicroelectronics/STM32CubeH5 to
build.

YEEP144lib/include/YEEP144.h

@@ -0,0 +1,21 @@
+#ifndef __YEEP144_H
+#define __YEEP144_H
+
+#include "stm32h5xx_hal.h"
+
+#define GPIO_MODE_OUTPUT GPIO_MODE_OUTPUT_PP
+
+#define DEBUGUART 1
+#define BLUETOOTHUART 2
+
+#define UARTSEL DEBUGUART
+
+// Public Function Prototypes
+int YEEP144_Init(void);
+
+void delayUS(uint32_t us);
+
+void YEEP144_GPIO_Init(GPIO_TypeDef* port, uint32_t pins, uint32_t mode);
+void YEEP144_GPIO_InitAdv(GPIO_TypeDef* port, uint32_t pins, uint32_t mode, uint32_t pull, uint32_t speed, uint32_t alternate);
+
+#endif