feat(driver): add escape to the pressKey surface

escape is a key a spec has real use for and no platform could send it. android maps it to KEYCODE_ESCAPE, the ios companion to HID usage 41 and the in-simulator runner to XCUIKeyboardKey.escape, and the Key union accepts it so it can be written at all.

internal/driver/ioscompanion/keymap.go

@@ -9,6 +9,7 @@ const (
 	usage1            = 30
 	usage0            = 39
 	usageReturn       = 40
+	usageEscape       = 41
 	usageTab          = 43
 	usageSpace        = 44
 	usageBackspace    = 42