* BIG refactor: 'board' and 'radio' objects now defined in 'target.h/.cpp'

* mesh::RTCClock class moved to MeshCore.h

variants/lilygo_t3s3/platformio.ini

@@ -3,6 +3,7 @@ extends = esp32_base
 board = t3_s3_v1_x
 build_flags =
   ${esp32_base.build_flags}
+  -I variants/lilygo_t3s3
   -D LILYGO_T3S3
   -D P_LORA_DIO_1=33
   -D P_LORA_NSS=7
@@ -26,6 +27,7 @@ build_flags =
   -D LORA_TX_POWER=22
   -D SX126X_RX_BOOSTED_GAIN=1
 build_src_filter = ${esp32_base.build_src_filter}
+  +<../variants/lilygo_t3s3>
 lib_deps =
   ${esp32_base.lib_deps}
   adafruit/Adafruit SSD1306 @ ^2.5.13