refactor: Integrate Modbus register defines into enums in modbus_server.h

Moved Modbus register definitions from  into enums within . This centralizes register definitions, improves type safety, and enhances code readability.

- : Added  and  to the  of holding registers.
- : Removed the  directive for .
- : Deleted this file as its contents are now integrated into .
Signed-off-by: Eduard Iten <eduard@iten.pro>

software/include/lib/modbus_server.h

@@ -97,6 +97,14 @@ enum {
 	 * closing.
 	 */
 	REG_HOLDING_END_CURRENT_THRESHOLD_CLOSE_MA = 0x0004,
+	/**
+	 * @brief Current threshold in mA for obstacle detection during opening.
+	 */
+	REG_HOLDING_OBSTACLE_THRESHOLD_OPEN_MA = 0x0005,
+	/**
+	 * @brief Current threshold in mA for obstacle detection during closing.
+	 */
+	REG_HOLDING_OBSTACLE_THRESHOLD_CLOSE_MA = 0x0006,
 	/**
 	 * @brief Bitmask for reading and writing digital outputs. Bit 0: Output 1,
 	 * Bit 1: Output 2. 1=ON, 0=OFF.