Initial commit: MT firmware project

- BLE peripheral applications
- dr_piezo and bladder_patch projects

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

project/ble_peripheral/ble_app_bladder_patch/i2c_manager.h

@@ -0,0 +1,18 @@
+/*******************************************************************************
+ * @file    i2c_manager.h
+ * @brief   Common header for HW/SW I2C mutex control
+ ******************************************************************************/
+#ifndef __I2C_MANAGER_H__
+#define __I2C_MANAGER_H__
+
+#include <stdbool.h>
+#include "app_error.h"
+
+extern bool HW_I2C_FRQ;
+extern bool SW_I2C_FRQ;
+
+void hw_i2c_init_once(void);
+void sw_i2c_init_once(void);
+void i2c_reset_state(void);
+
+#endif