添加人体门状态检测功能，包含初始化和读取状态的逻辑，并更新主程序以集成此功能

components/human_door/include/human_door.h

@@ -0,0 +1,26 @@
+#pragma once
+
+#include <stdbool.h>
+
+#include "esp_err.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#define HUMAN_SENSOR_GPIO 16
+#define DOOR_SWITCH_GPIO 17
+
+typedef struct {
+    bool human_present;
+    bool door_closed;
+} human_door_state_t;
+
+// GPIO16: HC-SR312. High means motion detected.
+// GPIO17: Door switch. Low means door closed.
+esp_err_t human_door_init(void);
+esp_err_t human_door_read(human_door_state_t *out_state);
+
+#ifdef __cplusplus
+}
+#endif