Download asset to local and error fixing (#100)

* Update photo_manager pub package
* Added download endpoint for assets
* Successfully save a photo to the local device's gallery
* Save save a video to the local device's gallery
* Fixed #97
* Added download loading indicator
* Refactor and increase the font size for curated search thumbnail images
* Reposition loading animation on the search result page

mobile/lib/modules/search/ui/thumbnail_with_info.dart

@@ -0,0 +1,67 @@
+import 'package:cached_network_image/cached_network_image.dart';
+import 'package:flutter/material.dart';
+import 'package:hive_flutter/hive_flutter.dart';
+import 'package:immich_mobile/constants/hive_box.dart';
+import 'package:immich_mobile/utils/capitalize_first_letter.dart';
+
+class ThumbnailWithInfo extends StatelessWidget {
+  const ThumbnailWithInfo({Key? key, required this.textInfo, required this.imageUrl, required this.onTap})
+      : super(key: key);
+
+  final String textInfo;
+  final String imageUrl;
+  final Function onTap;
+
+  @override
+  Widget build(BuildContext context) {
+    var box = Hive.box(userInfoBox);
+
+    return GestureDetector(
+      onTap: () {
+        onTap();
+      },
+      child: Padding(
+        padding: const EdgeInsets.only(right: 8.0),
+        child: SizedBox(
+          width: MediaQuery.of(context).size.width / 2,
+          child: Stack(
+            alignment: Alignment.bottomCenter,
+            children: [
+              Container(
+                foregroundDecoration: BoxDecoration(
+                  borderRadius: BorderRadius.circular(10),
+                  color: Colors.black26,
+                ),
+                child: ClipRRect(
+                  borderRadius: BorderRadius.circular(10),
+                  child: CachedNetworkImage(
+                    width: 250,
+                    height: 250,
+                    fit: BoxFit.cover,
+                    imageUrl: imageUrl,
+                    httpHeaders: {"Authorization": "Bearer ${box.get(accessTokenKey)}"},
+                  ),
+                ),
+              ),
+              Positioned(
+                bottom: 8,
+                left: 10,
+                child: SizedBox(
+                  width: MediaQuery.of(context).size.width / 3,
+                  child: Text(
+                    textInfo.capitalizeFirstLetter(),
+                    style: const TextStyle(
+                      color: Colors.white,
+                      fontWeight: FontWeight.bold,
+                      fontSize: 16,
+                    ),
+                  ),
+                ),
+              ),
+            ],
+          ),
+        ),
+      ),
+    );
+  }
+}