Add Pico2W variant including Wifi support. (#6062)

variants/rpipico2w/platformio.ini

@@ -0,0 +1,30 @@
+[env:pico2w]
+extends = rp2350_base
+board = rpipico2w
+upload_protocol = jlink
+# debug settings for external openocd with RP2040 support (custom build)
+debug_tool = custom
+debug_init_cmds =
+  target extended-remote localhost:3333
+  $INIT_BREAK
+  monitor reset halt
+  $LOAD_CMDS
+  monitor init
+  monitor reset halt
+
+# add our variants files to the include and src paths
+build_flags = ${rp2350_base.build_flags} 
+  -DRPI_PICO2
+  -Ivariants/rpipico2w
+#  -DDEBUG_RP2040_PORT=Serial
+  -DHW_SPI1_DEVICE
+  -DARDUINO_RASPBERRY_PI_PICO_2W
+  -DARDUINO_ARCH_RP2040
+  -DHAS_WIFI=1
+  -L "${platformio.libdeps_dir}/${this.__env__}/bsec2/src/cortex-m33"
+  -fexceptions  # for exception handling in MQTT
+build_src_filter = ${rp2350_base.build_src_filter} +<mesh/wifi/>
+lib_deps =
+  ${rp2350_base.lib_deps}
+  ${networking_base.lib_deps}
+debug_build_flags = ${rp2350_base.build_flags}, -g