[APP-1356] Policy update dialog (#8782)

* Add blocking announcement dialog feature

* WIP custom dialog

* Rework dialog and add native FocusScope

* Lock scroll on web, fix backdrop

* Add web FocusScope

* Create custom Outlet for these announcements

* Clean up FocusScope native impl

* Comments

* Some styling fixes

* Handle screen reader specifically

* Clean up state, remove Portal edits

* Reorg, rename

* Add syncing, tests

* Revert dialog updates

* Revert formatting

* Delete unused file

* Format

* Add FullWindowOverlay

* remove mmkv storage in debug btn

* Add debug code

* fix taps passing through on iOS

* Reorg

* Reorg, rename everything

* Complete policy update after signup

* Add logger

* Move context around, unmount portals on native

* Move a11y prop into FocusScope

* Remove useMemo

* Update dates

* Move debug to dev settings

* Unmount web portals until policy update completed

* UPdate dates

---------

Co-authored-by: Samuel Newman <mozzius@protonmail.com>

src/components/PolicyUpdateOverlay/context.tsx

@@ -0,0 +1,32 @@
+import {createContext, type ReactNode, useContext} from 'react'
+
+import {Provider as PortalProvider} from '#/components/PolicyUpdateOverlay/Portal'
+import {
+  type PolicyUpdateState,
+  usePolicyUpdateState,
+} from '#/components/PolicyUpdateOverlay/usePolicyUpdateState'
+
+const Context = createContext<PolicyUpdateState>({
+  completed: true,
+  complete: () => {},
+})
+
+export function usePolicyUpdateStateContext() {
+  const context = useContext(Context)
+  if (!context) {
+    throw new Error(
+      'usePolicyUpdateStateContext must be used within a PolicyUpdateProvider',
+    )
+  }
+  return context
+}
+
+export function Provider({children}: {children?: ReactNode}) {
+  const state = usePolicyUpdateState()
+
+  return (
+    <PortalProvider>
+      <Context.Provider value={state}>{children}</Context.Provider>
+    </PortalProvider>
+  )
+}