118 - Implement shared album feature (#124)

* New features 
  - Share album. Users can now create albums to share with existing people on the network.
  - Owner can delete the album.
  - Owner can invite the additional users to the album.
  - Shared users and the owner can add additional assets to the album.
* In the asset viewer, the user can swipe up to see detailed information and swip down to dismiss.
* Several UI enhancements.

mobile/lib/modules/sharing/ui/shared_album_thumbnail_image.dart

@@ -0,0 +1,55 @@
+import 'package:cached_network_image/cached_network_image.dart';
+import 'package:flutter/material.dart';
+import 'package:flutter_hooks/flutter_hooks.dart';
+import 'package:hive_flutter/hive_flutter.dart';
+import 'package:hooks_riverpod/hooks_riverpod.dart';
+import 'package:immich_mobile/constants/hive_box.dart';
+import 'package:immich_mobile/shared/models/immich_asset.model.dart';
+
+class SharedAlbumThumbnailImage extends HookConsumerWidget {
+  final ImmichAsset asset;
+
+  const SharedAlbumThumbnailImage({Key? key, required this.asset}) : super(key: key);
+
+  @override
+  Widget build(BuildContext context, WidgetRef ref) {
+    final cacheKey = useState(1);
+
+    var box = Hive.box(userInfoBox);
+    var thumbnailRequestUrl =
+        '${box.get(serverEndpointKey)}/asset/file?aid=${asset.deviceAssetId}&did=${asset.deviceId}&isThumb=true';
+
+    return GestureDetector(
+      onTap: () {
+        // debugPrint("View ${asset.id}");
+      },
+      child: Hero(
+        tag: asset.id,
+        child: Stack(
+          children: [
+            CachedNetworkImage(
+              cacheKey: "${asset.id}-${cacheKey.value}",
+              width: 500,
+              height: 500,
+              memCacheHeight: asset.type == 'IMAGE' ? 500 : 500,
+              fit: BoxFit.cover,
+              imageUrl: thumbnailRequestUrl,
+              httpHeaders: {"Authorization": "Bearer ${box.get(accessTokenKey)}"},
+              fadeInDuration: const Duration(milliseconds: 250),
+              progressIndicatorBuilder: (context, url, downloadProgress) => Transform.scale(
+                scale: 0.2,
+                child: CircularProgressIndicator(value: downloadProgress.progress),
+              ),
+              errorWidget: (context, url, error) {
+                return Icon(
+                  Icons.image_not_supported_outlined,
+                  color: Theme.of(context).primaryColor,
+                );
+              },
+            ),
+          ],
+        ),
+      ),
+    );
+  }
+}