UI: connect to wifi prompt (#28273)

* OffroadHome: move experimental mode button to right column

* OffroadHome: replace DriveStats with PrimeAd when no prime

* SetupWidget: remove PrimeAd

* SetupWidget: tweaks to fit smaller space

* UI: add WiFiPromptWidget

* WiFiPrompt: update using network type

* add WiFiPromptWidget to offroad home

* reduce spacing to fit vertical space

* WiFiPromptWidget: open Wi-Fi settings

* no longer necessary

* cleanup

* shrink PrimeUser widget and increase Setup Wi-Fi font size

* correctly resize widget when stack index changes

* layout tweaks

* debug

* spacing

* slightly improved style

* helps -> help

* .
old-commit-hash: 4f815db141

selfdrive/ui/SConscript

@@ -20,7 +20,7 @@ if arch == "Darwin":
   qt_env['FRAMEWORKS'] += ['OpenCL']
 
 qt_util = qt_env.Library("qt_util", ["#selfdrive/ui/qt/api.cc", "#selfdrive/ui/qt/util.cc"], LIBS=base_libs)
-widgets_src = ["ui.cc", "qt/widgets/input.cc", "qt/widgets/drive_stats.cc",
+widgets_src = ["ui.cc", "qt/widgets/input.cc", "qt/widgets/drive_stats.cc", "qt/widgets/wifi.cc",
                "qt/widgets/ssh_keys.cc", "qt/widgets/toggle.cc", "qt/widgets/controls.cc",
                "qt/widgets/offroad_alerts.cc", "qt/widgets/prime.cc", "qt/widgets/keyboard.cc",
                "qt/widgets/scrollview.cc", "qt/widgets/cameraview.cc", "#third_party/qrcode/QrCode.cc",