add wifi support to thinknode m7 ble variant

variants/thinknode_m7/platformio.ini

@@ -98,11 +98,13 @@ build_flags =
   -D MAX_GROUP_CHANNELS=40
   -D BLE_PIN_CODE=123456
   -D OFFLINE_QUEUE_SIZE=256
+  -D ENABLE_WIFI_INTERFACE
   ; -D BLE_DEBUG_LOGGING=1
   ; -D MESH_PACKET_LOGGING=1
 build_src_filter = ${ThinkNode_M7.build_src_filter}
   ${ThinkNode_M7_ethernet.build_src_filter}
   +<helpers/esp32/*.cpp>
+  +<helpers/wifi/*.cpp>
   +<helpers/ui/MomentaryButton.cpp>
   +<helpers/ui/NullDisplayDriver.cpp>
   +<../examples/companion_radio/*.cpp>