Move getChipId to separate class

src/Utils.cpp

@@ -0,0 +1,11 @@
+#include "utils.h"
+#include <Esp.h>
+
+uint32_t Utils::getChipId()
+{
+    uint32_t chipId = 0;
+    for (int i = 0; i < 17; i += 8) {
+        chipId |= ((ESP.getEfuseMac() >> (40 - i)) & 0xff) << i;
+    }
+    return chipId;
+}