feat(core): detect ios alerts and permission prompts for screen.on('dialog')

[gmegidish]

Stacked on #360. Adds iOS to screen.on('dialog').

Detection

mobilecli's iOS tree shows both app alerts and system permission prompts (from SpringBoard) as an Alert node: label = title, flat children = title and message StaticTexts, an optional TextField, and Buttons.

• type: prompt if there's a TextField, confirm if more than one button, otherwise alert
• permission / isSystem(): nothing in the tree marks a system alert, so this checks for the app name in curly quotes in the title (“Playground” would like to access the Camera.). A locale that quotes differently reads as an app alert.
• accept / dismiss follow Apple's button layout, not labels:
  • side by side: accept = right, dismiss = left (Cancel/OK, Don't Allow/Allow)
  • stacked: dismiss = bottom; accept = top for app alerts, the one above Don't Allow for permission prompts (Allow While Using App)

WDA instead always uses last = accept and first = dismiss, which would tap "Don't Allow" when accepting the iOS location prompt.

accept(text) now finds the OK button again by re-detecting the dialog, so it works on both platforms (iOS buttons have no ids).

e2e

e2e/src/android/dialogs.test.ts → e2e/src/dialogs/dialogs.test.ts, which now runs on both platforms:

• uses getByTestId
• scrolls buttons into view, since iOS Form only lists rendered rows

Known gap

On iOS simulators, clearAppData() doesn't reset permissions. Today that needs simctl privacy reset all <bundle>, and notifications only reset on reinstall. The e2e permission tests therefore need a fresh install on iOS. Documented in the guide.

Test plan

• 7 new iOS unit tests; all 812 core unit tests pass; lint
• e2e 8/8 on iPhone 17 Pro simulator (iOS 26.5, fresh install) with feat: app alerts and location/notifications permission requests on ios playground#22
• e2e 8/8 on Pixel 9a emulator (API 37)

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