FL-339: cli diagnostic interface for power subsystem. (#256)

* Core, API: add externs for c++
* Makefile: improve debug speed, flash with openocd, cleanup f2 config
* Power: add cli diagnostic.
* Local: fix api hal externs
* Local: fix externs in main and flipper_hal
* F2: power state dump stabs
* Bootloader flashing with openocd
* F3: move bq drivers to libs
* temporary do not build drivers on local
* temporary do not build drivers on f2

Co-authored-by: aanper <mail@s3f.ru>

firmware/targets/local/Inc/flipper_hal.h

@@ -10,6 +10,10 @@ GPIO and HAL implementations
 #include <stdbool.h>
 #include "main.h"
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 #define GPIOA "PA"
 #define GPIOB "PB"
 #define GPIOC "PC"
@@ -50,4 +54,8 @@ typedef const char* SPI_HandleTypeDef;
 typedef uint32_t HAL_StatusTypeDef;
 
 HAL_StatusTypeDef
-HAL_SPI_Transmit(SPI_HandleTypeDef* hspi, uint8_t* pData, uint16_t Size, uint32_t Timeout);
+HAL_SPI_Transmit(SPI_HandleTypeDef* hspi, uint8_t* pData, uint16_t Size, uint32_t Timeout);
+
+#ifdef __cplusplus
+}
+#endif