[SERIAL] Add the capability send info to Serial instead of/added MQTT (#2030)

* [SERIAL] Add the capability send info to Serial instead of/added MQTT

Add the capability to send json data to Serial as a communication layer, added/instead of MQTT

* Use delay rather than vTaskDelay

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Co-authored-by: Florian <1technophile@users.noreply.github.com>

main/config_BT.h

@@ -29,7 +29,6 @@
 extern void setupBT();
 extern bool BTtoMQTT();
 extern void MQTTtoBT(char* topicOri, JsonObject& RFdata);
-extern void pubMainCore(JsonObject& data);
 extern void launchBTDiscovery(bool overrideDiscovery);
 extern void stopProcessing();
 extern String stateBTMeasures(bool);