standalone test for memory optimizations (200+ entities)

src/test/test.h

@@ -65,6 +65,7 @@ class Test {
     static void uart_telegram_withCRC(const char * rx_data);
     static void add_device(uint8_t device_id, uint8_t product_id);
     static void debug(uuid::console::Shell & shell, const std::string & command);
+    static void refresh();
 #ifndef EMSESP_STANDALONE
     static void listDir(fs::FS & fs, const char * dirname, uint8_t levels);
 #endif