* new: SensorManager

* BasChatMesh: new onContactRequest(), for PAYLOAD_TYPE_REQ handling.
* companion, repeater and room_server: now with basic 'plumbing' to handle REQ_TYPE_GET_TELEMETRY_DATA (0x03).
* dependency: added CayenneLPP to libdeps
* all target.* modules now with a stub 'sensors' object.

variants/xiao_c3/target.h

@@ -7,10 +7,12 @@
 #include <helpers/CustomSX1262Wrapper.h>
 #include <helpers/CustomSX1268Wrapper.h>
 #include <helpers/AutoDiscoverRTCClock.h>
+#include <helpers/SensorManager.h>
 
 extern XiaoC3Board board;
 extern WRAPPER_CLASS radio_driver;
 extern AutoDiscoverRTCClock rtc_clock;
+extern SensorManager sensors;
 
 bool radio_init();
 uint32_t radio_get_rng_seed();