feat(mobile): add playbackStyle to native sync API (#26541)

* feat(mobile): add playbackStyle to native sync API

Adds a `playbackStyle` field to `PlatformAsset` in the pigeon sync API so
native platforms can communicate the asset's playback style (image, video,
animated, livePhoto) to Flutter during sync.

- Add `playbackStyleValue` computed property to `PHAsset` extension (iOS)
- Populate `playbackStyle` in `toPlatformAsset()` and the full-sync path
- Update generated Dart/Kotlin/Swift files

* fix(tests): add playbackStyle to local asset test cases

* fix(tests): update playbackStyle to use integer values in local sync tests

* feat(mobile): extend playbackStyle enum to include videoLooping

* Update PHAssetExtensions.swift

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

* fix(playback): simplify playbackStyleValue implementation by removing iOS version check

* feat(android): implement proper playbackStyle detection

* add PlatformAssetPlaybackStyle enum

* linting

---------

Co-authored-by: Mert <101130780+mertalev@users.noreply.github.com>
Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

mobile/pigeon/native_sync_api.dart

@@ -11,6 +11,15 @@ import 'package:pigeon/pigeon.dart';
     dartPackageName: 'immich_mobile',
   ),
 )
+enum PlatformAssetPlaybackStyle {
+  unknown,
+  image,
+  video,
+  imageAnimated,
+  livePhoto,
+  videoLooping,
+}
+
 class PlatformAsset {
   final String id;
   final String name;
@@ -31,6 +40,8 @@ class PlatformAsset {
   final double? latitude;
   final double? longitude;
 
+  final PlatformAssetPlaybackStyle playbackStyle;
+
   const PlatformAsset({
     required this.id,
     required this.name,
@@ -45,6 +56,7 @@ class PlatformAsset {
     this.adjustmentTime,
     this.latitude,
     this.longitude,
+    this.playbackStyle = PlatformAssetPlaybackStyle.unknown,
   });
 }