feat(valve): Implement obstacle detection with configurable thresholds

Introduces separate configurable current thresholds for obstacle detection
during valve opening and closing movements.

- Added  state to .
- Added  and
   to .
- Modified  to implement obstacle detection in ,
  setting  on high current, and to load/save
  these new thresholds via settings.
- Added new setter/getter functions for obstacle thresholds to  and .
- Updated  with new shell commands (, )
  and updated  to display these settings.
- Updated  to document the new registers and error states.
- Updated  to include new register definitions, menu options,
  and display of obstacle current thresholds.

software/lib/shell_valve/shell_valve.c

@@ -55,6 +55,32 @@ static int cmd_valve_set_end_curr_close(const struct shell *sh, size_t argc, cha
 	return 0;
 }
 
+static int cmd_valve_set_obs_curr_open(const struct shell *sh, size_t argc, char **argv)
+{
+	if (argc != 2) {
+		shell_print(sh, "Usage: valve set_obs_curr_open <milliamps>");
+		return -EINVAL;
+	}
+
+	uint16_t current_ma = (uint16_t)atoi(argv[1]);
+	valve_set_obstacle_current_threshold_open(current_ma);
+	shell_print(sh, "Obstacle current threshold (open) set to %u mA.", current_ma);
+	return 0;
+}
+
+static int cmd_valve_set_obs_curr_close(const struct shell *sh, size_t argc, char **argv)
+{
+	if (argc != 2) {
+		shell_print(sh, "Usage: valve set_obs_curr_close <milliamps>");
+		return -EINVAL;
+	}
+
+	uint16_t current_ma = (uint16_t)atoi(argv[1]);
+	valve_set_obstacle_current_threshold_close(current_ma);
+	shell_print(sh, "Obstacle current threshold (close) set to %u mA.", current_ma);
+	return 0;
+}
+
 static int cmd_valve_show(const struct shell *sh, size_t argc, char **argv)
 {
 	const int label_width = 30;
@@ -72,6 +98,16 @@ static int cmd_valve_show(const struct shell *sh, size_t argc, char **argv)
 	    label_width,
 	    "End Current Threshold (Close):",
 	    valve_get_end_current_threshold_close());
+	shell_print(sh,
+	    "%*s %u mA",
+	    label_width,
+	    "Obstacle Current Threshold (Open):",
+	    valve_get_obstacle_current_threshold_open());
+	shell_print(sh,
+	    "%*s %u mA",
+	    label_width,
+	    "Obstacle Current Threshold (Close):",
+	    valve_get_obstacle_current_threshold_close());
 	return 0;
 }
 
@@ -86,6 +122,14 @@ SHELL_STATIC_SUBCMD_SET_CREATE(sub_valve_settings,
         NULL,
         "Set end current threshold for closing (mA)",
         cmd_valve_set_end_curr_close),
+    SHELL_CMD(set_obs_curr_open,
+        NULL,
+        "Set obstacle current threshold for opening (mA)",
+        cmd_valve_set_obs_curr_open),
+    SHELL_CMD(set_obs_curr_close,
+        NULL,
+        "Set obstacle current threshold for closing (mA)",
+        cmd_valve_set_obs_curr_close),
     SHELL_CMD(show, NULL, "Show valve configuration", cmd_valve_show),
     SHELL_SUBCMD_SET_END);