feat(mobile): iOS background sync (#1758)

* first run of getting background sync working in iOS

* got background sync calling into flutter

* added background task

* added necessary sync files

* fixed some names and added more implementations

* got as far as Hive.initFlutter

* brute force got to await Hive.initFlutter

* lots of print statements to figure out where execution is failing, and its failing at the root asset bundle in the localization.dart service

* first time working, got plugins registered

* removed broken cleanup code

* refactored

* linters

* now can pass user settings

* background service plugin uses app background processing instead of fetch

* renamed backgroundFetch to backgroundProcessing to make it clearer

* don't use max delay

* adds fetch back in

* fixes require charging default values and backup controller page

* fixes background fetch

* fixes ios not importing photos

* guarded path provider ios

* lint

* adds max tries for heartbeat to work in iOS

* fail after seconds

* timeout instead of fail after seconds

* removes release lock from system stop

* restores checkLockReleasedWithHeartbeat to Future<void>

* removes max tries from acquire lock

* fixes lock timeout with iOS

* restored for loop

* adds comments, made the AppRefresh task only run while not requiring network or charge

* fixed compile issue

* now both are registered and added better comments. also added ability for task to cancel itself

* added the podfile and pubspec

* added backup diagnostics to IOS and removed iOS ignored backup options and fixed network connectivity always required

* Added Alex's dev team

* styled debug list item, fixed refresh task not set bug, fixed enable / disable background service on platform channel

---------

Co-authored-by: Marty Fuhry <marty@fuhry.farm>
Co-authored-by: Alex Tran <alex.tran1502@gmail.com>

mobile/ios/Podfile.lock

@@ -24,6 +24,8 @@ PODS:
   - path_provider_foundation (0.0.1):
     - Flutter
     - FlutterMacOS
+  - path_provider_ios (0.0.1):
+    - Flutter
   - photo_manager (2.0.0):
     - Flutter
     - FlutterMacOS
@@ -55,6 +57,7 @@ DEPENDENCIES:
   - isar_flutter_libs (from `.symlinks/plugins/isar_flutter_libs/ios`)
   - package_info_plus (from `.symlinks/plugins/package_info_plus/ios`)
   - path_provider_foundation (from `.symlinks/plugins/path_provider_foundation/ios`)
+  - path_provider_ios (from `.symlinks/plugins/path_provider_ios/ios`)
   - photo_manager (from `.symlinks/plugins/photo_manager/ios`)
   - share_plus (from `.symlinks/plugins/share_plus/ios`)
   - shared_preferences_foundation (from `.symlinks/plugins/shared_preferences_foundation/ios`)
@@ -90,6 +93,8 @@ EXTERNAL SOURCES:
     :path: ".symlinks/plugins/package_info_plus/ios"
   path_provider_foundation:
     :path: ".symlinks/plugins/path_provider_foundation/ios"
+  path_provider_ios:
+    :path: ".symlinks/plugins/path_provider_ios/ios"
   photo_manager:
     :path: ".symlinks/plugins/photo_manager/ios"
   share_plus:
@@ -117,6 +122,7 @@ SPEC CHECKSUMS:
   isar_flutter_libs: b69f437aeab9c521821c3f376198c4371fa21073
   package_info_plus: 6c92f08e1f853dc01228d6f553146438dafcd14e
   path_provider_foundation: 37748e03f12783f9de2cb2c4eadfaa25fe6d4852
+  path_provider_ios: 14f3d2fd28c4fdb42f44e0f751d12861c43cee02
   photo_manager: 4f6810b7dfc4feb03b461ac1a70dacf91fba7604
   SAMKeychain: 483e1c9f32984d50ca961e26818a534283b4cd5c
   share_plus: 056a1e8ac890df3e33cb503afffaf1e9b4fbae68