Guided tour for new users (#4690)

* Add home guided tour (WIP)

* Add web handling of the tour

* Switch to our fork of rn-tourguide

* Bump guided-tour

* Fix alignment on android

* Implement home page tour trigger after account creation

* Add new_user_guided_tour gate

* Add a title line to the tour tooltips

* A11y improvements: proper labels, focus capture, scroll capture

* Silence type error

* Native a11y

* Use FocusScope

* Switch to useWebBodyScrollLock()

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Co-authored-by: Eric Bailey <git@esb.lol>

src/tours/positioning.ts

@@ -0,0 +1,23 @@
+import {useWindowDimensions} from 'react-native'
+import {useSafeAreaInsets} from 'react-native-safe-area-context'
+
+import {useShellLayout} from '#/state/shell/shell-layout'
+
+export function useHeaderPosition() {
+  const {headerHeight} = useShellLayout()
+  const {width} = useWindowDimensions()
+  const insets = useSafeAreaInsets()
+
+  return {
+    top: insets.top,
+    left: 10,
+    width: width - 20,
+    height: headerHeight.value,
+    borderRadiusObject: {
+      topLeft: 4,
+      topRight: 4,
+      bottomLeft: 4,
+      bottomRight: 4,
+    },
+  }
+}