init: initial commit

components/led_indicator/include/led_indicator.h

@@ -0,0 +1,14 @@
+#pragma once
+
+typedef enum {
+    LED_OFF,
+    LED_PROVISIONING,  /* 200ms toggle — awaiting provisioning */
+    LED_CONNECTING,    /* 1000ms toggle — connecting to WiFi/MQTT */
+    LED_SCANNING,      /* solid on — normal BLE scanning */
+    LED_CALIBRATING,   /* 500ms toggle — calibration in progress */
+    LED_SELECTED,      /* triple-flash loop — physical identification */
+    LED_ERROR,         /* 50ms rapid blink */
+} led_state_t;
+
+void led_indicator_init(void);
+void led_indicator_set(led_state_t state);