feat(esp_wifi): Add support for advanced roaming as a wifi app

- Adds support for advanced roaming as a wifi app.

components/wpa_supplicant/esp_supplicant/src/esp_wpa_main.c

@@ -39,6 +39,9 @@
 #include "ap/sta_info.h"
 #include "wps/wps_defs.h"
 #include "wps/wps.h"
+#if CONFIG_ESP_WIFI_ENABLE_ROAMING_APP
+#include "esp_roaming.h"
+#endif
 
 #ifdef CONFIG_DPP
 #include "common/dpp.h"
@@ -469,6 +472,10 @@ int esp_supplicant_init(void)
     ret =  esp_wifi_internal_wapi_init();
 #endif
 
+#if CONFIG_ESP_WIFI_ENABLE_ROAMING_APP
+    init_roaming_app();
+#endif
+
     return ret;
 }