fix(nimble): Adding missing esp_nimble_enable/disbale declaration in header file

porting/npl/esp-idf/include/nimble/nimble_port_freertos.h

@@ -19,6 +19,21 @@ void nimble_port_freertos_init(TaskFunction_t host_task_fn);
 
 void nimble_port_freertos_deinit(void);
 
+/**
+ * @brief esp_nimble_enable - Initialize the NimBLE host task
+ * 
+ * @param host_task 
+ * @return esp_err_t 
+ */
+esp_err_t esp_nimble_enable(void *host_task);
+
+/**
+ * @brief esp_nimble_disable - Disable the NimBLE host task
+ * 
+ * @return esp_err_t 
+ */
+esp_err_t esp_nimble_disable(void);
+
 #ifdef __cplusplus
 }
 #endif