Pico W: Initial Wi-Fi support (#2980)

* Pico W: Initial WiFi support: connects, but freezes after a while

* Update arduino-pico core to fix hang with Wi-Fi

* Add `picow` to workflow since it's different from `pico` now

src/mqtt/MQTT.cpp

@@ -7,9 +7,9 @@
 #include "mesh/Router.h"
 #include "mesh/generated/meshtastic/mqtt.pb.h"
 #include "mesh/generated/meshtastic/telemetry.pb.h"
-#include "mesh/http/WiFiAPClient.h"
 #include "sleep.h"
 #if HAS_WIFI
+#include "mesh/wifi/WiFiAPClient.h"
 #include <WiFi.h>
 #endif
 #include "mqtt/JSON.h"