VesiScan BASIC origin: Piezo + IMU firmware initial code

- nRF52840 + SoftDevice S140 BLE firmware
- Piezo ultrasound TX driver (2MHz, 8ch MUX)
- ICM42670P IMU 6-axis driver
- Echo AFE chain (ADA2200 + ADC121S051)
- BLE NUS command parser (mpa/mpc/mdc/mec/maa/msp)
- FDS flash config storage
- pc_firm parser and ADC driver included

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

project/dfu/secure_bootloader/main.c

@@ -3,7 +3,7 @@
  * @author	CandyPops Co.
  * @version	V1.0.0
  * @date	2022-09-05
- * @brief   
+ * @brief
  ******************************************************************************/
 
 #include <stdint.h>
@@ -21,7 +21,7 @@
 #include "nrf_bootloader_info.h"
 #include "nrf_delay.h"
 
-#define POWER_HOLD	NRF_GPIO_PIN_MAP(0,8)		// power hold port for medithings device 
+#define POWER_HOLD	NRF_GPIO_PIN_MAP(0,8)		// power hold port for medithings device
 
 static void on_error(void)
 {
@@ -90,7 +90,7 @@ int main(void)
     nrf_gpio_cfg_output(POWER_HOLD);
     nrf_gpio_pin_set(POWER_HOLD);		// The medithings device performs power hold when the power button is pressed for 3 seconds.
                                     // And then, The medithings device loads the bootloader.
-	
+
     // Must happen before flash protection is applied, since it edits a protected page.
     nrf_bootloader_mbr_addrs_populate();