* new ESPNOWRadio driver

* refactored the examples/*/main.cpp modules, moving radio specifics to variants/*/target modules
* new Generic_ESPNOW_* target envs

variants/lilygo_tlora_v2_1/target.h

@@ -1,9 +1,16 @@
 #pragma once
 
+#define RADIOLIB_STATIC_ONLY 1
+#include <RadioLib.h>
+#include <helpers/RadioLibWrappers.h>
 #include <helpers/LilyGoTLoraBoard.h>
 #include <helpers/CustomSX1276Wrapper.h>
 
 extern LilyGoTLoraBoard board;
-extern RADIO_CLASS radio;
+extern WRAPPER_CLASS radio_driver;
 
 bool radio_init();
+uint32_t radio_get_rng_seed();
+void radio_set_params(float freq, float bw, uint8_t sf, uint8_t cr);
+void radio_set_tx_power(uint8_t dbm);
+mesh::LocalIdentity radio_new_identity();