Implement bootloader #137 (#142)

* Boot: switch to DFU routines. Implements #132 part 1 of 2.

* Boot: boot to DFU shortcut, hard reset USB on each boot. Implements #132 part 2 of 2.

* Deploy scripts: fix path for deploy dfu.

* Bootloader: initial version. Target_f2: rebase, update deployment scripts.

* Bootloader: cleanup, refactor switch2 proc. Readme,wiki: document bootloader.

* Wiki: deploy symlinks as files, bootloader info.

* Target_f2: valid flash size in linker script.

* Github CI: bootloader build and artifacts.

* Bootloader: rename platforms to targets.

* Bootloader: change dfu/os colors.

* disable set -e

* lint code

* add bootloader testing page

Co-authored-by: Aleksandr Kutuzov <aku@plooks.com>
Co-authored-by: aanper <mail@s3f.ru>

target_f2/Src/main.c

@@ -20,6 +20,7 @@
 
 /* Includes ------------------------------------------------------------------*/
 #include "main.h"
+#include "boot.h"
 #include "cmsis_os.h"
 #include "usb_device.h"
 
@@ -89,7 +90,6 @@ void StartDefaultTask(void const* argument);
   */
 int main(void) {
     /* USER CODE BEGIN 1 */
-
     /* USER CODE END 1 */
 
     /* MCU Configuration--------------------------------------------------------*/