Error handling on system boot (#30)

Implements #3

Reviewed-on: #30
Co-authored-by: localhorst <localhorst@mosad.xyz>
Co-committed-by: localhorst <localhorst@mosad.xyz>

main/wifi.h

@@ -1,3 +1,22 @@
+/**
+ * @file wifi.h
+ * @brief WiFi station mode initialization and management.
+ *
+ * This module initializes WiFi in station mode with static IP
+ * configuration. It handles connection and automatic reconnection.
+ */
+
 #pragma once
 
-void initWifi(void);
+#include "esp_err.h"
+
+/**
+ * @brief Initialize WiFi in station mode.
+ *
+ * Configures WiFi with static IP address from Kconfig settings
+ * and connects to the configured access point. Blocks until
+ * connected or maximum retry count is reached.
+ *
+ * @return ESP_OK on success, ESP_FAIL on error.
+ */
+esp_err_t initWifi(void);