json/info: brand and product configurable by compile variables

For MM builds brand = WLEDMM
Will be used in WLED-Native - by Moustachauve

Changed in bh1750, bme280, pir, json.cpp and wled.h

wled00/json.cpp

@@ -1093,8 +1093,8 @@ void serializeInfo(JsonObject root)
   #endif
   root[F("opt")] = os;
 
-  root[F("brand")] = "WLED";
-  root[F("product")] = F("FOSS");
+  root[F("brand")] = F(WLED_BRAND); //WLEDMM + Moustachauve/Wled-Native
+  root[F("product")] = F(WLED_PRODUCT_NAME); //WLEDMM + Moustachauve/Wled-Native
   root["mac"] = escapedMac;
   char s[16] = "";
   if (Network.isConnected())