feat: Make valve obstacle detection parameters configurable via settings and shell

This commit introduces configurable obstacle detection thresholds for the valve, allowing them to be set and persisted via the Zephyr settings subsystem and controlled through the shell and Modbus tool.

- `software/lib/valve/Kconfig`: Added new Kconfig options `VALVE_OBSTACLE_THRESHOLD_OPEN_MA` and `VALVE_OBSTACLE_THRESHOLD_CLOSE_MA` for compile-time configuration and default values.
- `software/include/lib/valve.h`: Removed hardcoded defines and added API functions for setting and getting obstacle thresholds.
- `software/lib/valve/valve.c`:
    - Updated `valve_work_handler` to use the new configurable obstacle thresholds.
    - Integrated loading and saving of obstacle thresholds via the settings subsystem in `valve_init`.
    - Implemented the new setter and getter functions for obstacle thresholds.
    - Updated the `LOG_INF` message in `valve_init` to display the new obstacle threshold values.
- `software/apps/slave_node/prj.conf`: Added default values for the new Kconfig options.
- `software/lib/shell_valve/shell_valve.c`: Added new shell commands `valve set_obstacle_open` and `valve set_obstacle_close` to modify the obstacle thresholds, and updated `valve show` to display them.
- `software/tools/modbus_tool/modbus_tool.py`:
    - Defined new Modbus holding registers (`REG_HOLDING_OBSTACLE_THRESHOLD_OPEN_MA`, `REG_HOLDING_OBSTACLE_THRESHOLD_CLOSE_MA`).
    - Updated `poll_status` to read these new registers.
    - Modified the `main_menu` to include "Set Obstacle Open" and "Set Obstacle Close" options in the settings menu, allowing users to view and modify these parameters.
- `software/lib/modbus_server/modbus_server.c`:
    - Updated `holding_reg_rd` to read the new obstacle threshold registers.
    - Updated `holding_reg_wr` to write to the new obstacle threshold registers.
    - Removed incorrect `REG_HOLDING_END_CURRENT_THRESHOLD_OPEN_MA` and `REG_HOLDING_END_CURRENT_THRESHOLD_CLOSE_MA` cases from `input_reg_rd`.
- `software/include/lib/modbus_registers.h`: Created a new header file to centralize Modbus register definitions, which were previously hardcoded in `modbus_tool.py`.
Signed-off-by: Eduard Iten <eduard@iten.pro>

software/include/lib/valve.h

@@ -17,9 +17,6 @@
 #define VALVE_CHANNEL_CLOSE 1
 #define VALVE_ENDPOSITION_CHECK_INTERVAL K_MSEC(100)
 
-#define VALVE_OBSTACLE_THRESHOLD_OPEN_MA 200
-#define VALVE_OBSTACLE_THRESHOLD_CLOSE_MA 200
-
 /**
  * @brief Represents the static state of the valve (open or closed).
  */
@@ -164,4 +161,33 @@ int32_t valve_get_vnd_temp(void);
  * @return The voltage in millivolts.
  */
 int32_t valve_get_vnd_voltage(void);
-#endif // VALVE_H
+
+/**
+ * @brief Sets the current threshold for obstacle detection during opening.
+ *
+ * @param current_ma The current threshold in milliamps.
+ */
+void valve_set_obstacle_threshold_open(uint16_t current_ma);
+
+/**
+ * @brief Sets the current threshold for obstacle detection during closing.
+ *
+ * @param current_ma The current threshold in milliamps.
+ */
+void valve_set_obstacle_threshold_close(uint16_t current_ma);
+
+/**
+ * @brief Gets the current threshold for obstacle detection during opening.
+ *
+ * @return The current threshold in milliamps.
+ */
+uint16_t valve_get_obstacle_threshold_open(void);
+
+/**
+ * @brief Gets the current threshold for obstacle detection during closing.
+ *
+ * @return The current threshold in milliamps.
+ */
+uint16_t valve_get_obstacle_threshold_close(void);
+
+#endif // VALVE_H