nRF52840: Migrate variants to new structure (#7396)

variants/nrf52840/monteops_hw1/platformio.ini

@@ -0,0 +1,16 @@
+; MonteOps M.Node/M.Backbone/M.Eagle hardware based on hardware variant #1 (RAK4630 based)
+[env:monteops_hw1]
+board_level = extra
+extends = nrf52840_base
+board = wiscore_rak4631
+build_flags = ${nrf52840_base.build_flags}
+  -I variants/nrf52840/monteops_hw1
+  -D MONTEOPS_HW1
+build_src_filter = ${nrf52_base.build_src_filter} +<../variants/nrf52840/monteops_hw1> +<mesh/eth/> +<mesh/api/> +<mqtt/>
+lib_deps = 
+  ${nrf52840_base.lib_deps}
+  ${networking_base.lib_deps}
+  https://github.com/RAKWireless/RAK13800-W5100S/archive/1.0.2.zip
+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