add why2025 badge as a target

variants/xiao_c6/platformio.ini

@@ -121,3 +121,65 @@ build_src_filter = ${Meshimi.build_src_filter}
 lib_deps =
   ${Meshimi.lib_deps}
   densaugeo/base64 @ ~1.4.0
+
+; WHY2025 badge variant
+; requires soldering 2 pins between the esp32-C6 and the lora chip as shown here: https://wiki.why2025.org/Project:Meshtastic_on_the_WHY2025_badge
+; also requires wiping the esp32-P4
+[WHY2025_badge]
+extends = Xiao_C6
+board_build.partitions = default_8MB.csv
+board_upload.flash_size = 8MB
+board_upload.maximum_size = 8388608
+build_flags =
+  ${Xiao_C6.build_flags}
+  -D P_LORA_SCLK=6
+  -D P_LORA_MISO=2
+  -D P_LORA_MOSI=7
+  -D P_LORA_NSS=4
+  -D P_LORA_DIO_1=5
+  -D P_LORA_BUSY=11
+  -D P_LORA_RESET=1
+  -D SX126X_TXEN=3
+  -UPIN_BOARD_SDA
+  -UPIN_BOARD_SCL
+  -UP_LORA_TX_LED
+  -USX126X_RXEN
+  -USX126X_DIO2_AS_RF_SWITCH
+  -USX126X_DIO3_TCXO_VOLTAGE
+
+[env:WHY2025_badge_Repeater]
+extends = WHY2025_badge
+build_src_filter = ${WHY2025_badge.build_src_filter}
+  +<../examples/simple_repeater/main.cpp>
+build_flags =
+  ${WHY2025_badge.build_flags}
+  -D ADVERT_NAME='"WHY2025 Badge Repeater"'
+  -D ADVERT_LAT=0.0
+  -D ADVERT_LON=0.0
+  -D ADMIN_PASSWORD='"password"'
+  -D MAX_NEIGHBOURS=8
+;  -D MESH_PACKET_LOGGING=1
+;  -D MESH_DEBUG=1
+lib_deps =
+  ${WHY2025_badge.lib_deps}
+;  ${esp32_ota.lib_deps}
+
+[env:WHY2025_badge_companion_radio_ble]
+extends = WHY2025_badge
+build_flags = ${WHY2025_badge.build_flags}
+  -D MAX_CONTACTS=100
+  -D MAX_GROUP_CHANNELS=8
+  -D BLE_PIN_CODE=123456
+  -D BLE_DEBUG_LOGGING=1
+  -D OFFLINE_QUEUE_SIZE=256
+  -D ENABLE_PRIVATE_KEY_IMPORT=1
+  -D ENABLE_PRIVATE_KEY_EXPORT=1
+;  -D MESH_PACKET_LOGGING=1
+;  -D MESH_DEBUG=1
+build_src_filter = ${WHY2025_badge.build_src_filter}
+  +<helpers/esp32/*.cpp>
+  -<helpers/esp32/ESPNOWRadio.cpp>
+  +<../examples/companion_radio/*.cpp>
+lib_deps =
+  ${WHY2025_badge.lib_deps}
+  densaugeo/base64 @ ~1.4.0