nRF52840: Migrate variants to new structure (#7396)

variants/nrf52840/rak_wismeshtap/platformio.ini

@@ -0,0 +1,31 @@
+; The very slick RAK wireless RAK10701 Field Tester device.  Note you will have to flash to Arduino bootloader to use this firmware.  Be aware touch is not currently working.
+[env:rak_wismeshtap]
+extends = nrf52840_base
+board = wiscore_rak4631
+build_flags = ${nrf52840_base.build_flags}
+  -Ivariants/nrf52840/rak_wismeshtap
+  -DWISMESH_TAP
+  -DRAK_4631
+  -DGPS_POWER_TOGGLE ; comment this line to disable triple press function on the user button to turn off gps entirely.
+  -DEINK_DISPLAY_MODEL=GxEPD2_213_BN
+  -DEINK_WIDTH=250
+  -DEINK_HEIGHT=122
+  -DMESHTASTIC_EXCLUDE_WIFI=1
+  -DMESHTASTIC_EXCLUDE_DETECTIONSENSOR=1
+  -DMESHTASTIC_EXCLUDE_STOREFORWARD=1
+  -DMESHTASTIC_EXCLUDE_POWER_TELEMETRY=1
+  -DMESHTASTIC_EXCLUDE_ATAK=1
+build_src_filter = ${nrf52_base.build_src_filter} +<../variants/nrf52840/rak_wismeshtap> +<mesh/eth/> +<mesh/api/> +<mqtt/>
+lib_deps = 
+  ${nrf52840_base.lib_deps}
+  ${networking_base.lib_deps}
+  melopero/Melopero RV3028@^1.1.0
+  https://github.com/RAKWireless/RAK13800-W5100S/archive/1.0.2.zip
+  rakwireless/RAKwireless NCP5623 RGB LED library@^1.0.2
+  bodmer/TFT_eSPI
+  beegee-tokyo/RAKwireless RAK12034@^1.0.0
+  beegee-tokyo/RAK14014-FT6336U @ 1.0.1
+  beegee-tokyo/RAK12035_SoilMoisture@^1.0.4
+debug_tool = jlink
+; If not set we will default to uploading over serial (first it forces bootloader entry by talking 1200bps to cdcacm)
+;upload_protocol = jlink