[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/storage/schema.ts

@@ -1,3 +1,5 @@
+import {type ID as PolicyUpdate202508} from '#/components/PolicyUpdateOverlay/updates/202508/config'
+
 /**
  * Device data that's specific to the device and does not vary based account
  */
@@ -13,6 +15,12 @@ export type Device = {
   devMode: boolean
   demoMode: boolean
   activitySubscriptionsNudged?: boolean
+
+  /**
+   * Policy update overlays. New IDs are required for each new announcement.
+   */
+  policyUpdateDebugOverride?: boolean
+  [PolicyUpdate202508]?: boolean
 }
 
 export type Account = {