Add UART LED_RING command for progress bar, digits, and clear.

Stop the main-loop digit demo so host-driven display persists; expose
clear/progress/digit modes with RGB and intensity via protobuf and goTool.

Co-authored-by: Cursor <cursoragent@cursor.com>

main/powerpod.c

@@ -6,6 +6,7 @@
 #include "cmd_version.h"
 #include "cmd_ota.h"
 #include "cmd_ota_slave_progress.h"
+#include "cmd_led_ring.h"
 #include "esp_now_comm.h"
 #include "powerpod.h"
 #include "driver/gpio.h"
@@ -168,20 +169,13 @@ void app_main(void) {
     cmd_client_info_register();
     cmd_accel_deadzone_register();
     cmd_espnow_unicast_test_register();
+    cmd_led_ring_register();
     cmd_ota_register();
     cmd_ota_slave_progress_register();
   }
 
-  uint8_t current_digit = 10;
+  ESP_LOGI(TAG, "LED ring: UART LED_RING commands only (no local demo loop)");
   while (1) {
-    led_command_t cmd = {.mode = LED_CMD_SET_DIGIT,
-                         .value = current_digit,
-                         .r = 5,
-                         .g = 5,
-                         .b = 0};
-
-    led_ring_send_command(&cmd);
-    current_digit = (current_digit + 1) % 11;
-    vTaskDelay(pdMS_TO_TICKS(500));
+    vTaskDelay(portMAX_DELAY);
   }
 }