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/album_title_text_field.dart

@@ -0,0 +1,68 @@
+import 'package:flutter/material.dart';
+import 'package:hooks_riverpod/hooks_riverpod.dart';
+import 'package:immich_mobile/modules/sharing/providers/album_title.provider.dart';
+
+class AlbumTitleTextField extends ConsumerWidget {
+  const AlbumTitleTextField({
+    Key? key,
+    required this.isAlbumTitleEmpty,
+    required this.albumTitleTextFieldFocusNode,
+    required this.albumTitleController,
+    required this.isAlbumTitleTextFieldFocus,
+  }) : super(key: key);
+
+  final ValueNotifier<bool> isAlbumTitleEmpty;
+  final FocusNode albumTitleTextFieldFocusNode;
+  final TextEditingController albumTitleController;
+  final ValueNotifier<bool> isAlbumTitleTextFieldFocus;
+
+  @override
+  Widget build(BuildContext context, WidgetRef ref) {
+    return TextField(
+      onChanged: (v) {
+        if (v.isEmpty) {
+          isAlbumTitleEmpty.value = true;
+        } else {
+          isAlbumTitleEmpty.value = false;
+        }
+
+        ref.watch(albumTitleProvider.notifier).setAlbumTitle(v);
+      },
+      focusNode: albumTitleTextFieldFocusNode,
+      style: TextStyle(fontSize: 28, color: Colors.grey[700], fontWeight: FontWeight.bold),
+      controller: albumTitleController,
+      onTap: () {
+        isAlbumTitleTextFieldFocus.value = true;
+
+        if (albumTitleController.text == 'Untitled') {
+          albumTitleController.clear();
+        }
+      },
+      decoration: InputDecoration(
+        contentPadding: const EdgeInsets.symmetric(horizontal: 8, vertical: 8),
+        suffixIcon: !isAlbumTitleEmpty.value && isAlbumTitleTextFieldFocus.value
+            ? IconButton(
+                onPressed: () {
+                  albumTitleController.clear();
+                  isAlbumTitleEmpty.value = true;
+                },
+                icon: const Icon(Icons.cancel_rounded),
+                splashRadius: 10,
+              )
+            : null,
+        enabledBorder: OutlineInputBorder(
+          borderSide: const BorderSide(color: Colors.transparent),
+          borderRadius: BorderRadius.circular(10),
+        ),
+        focusedBorder: OutlineInputBorder(
+          borderSide: const BorderSide(color: Colors.transparent),
+          borderRadius: BorderRadius.circular(10),
+        ),
+        hintText: 'Add a title',
+        focusColor: Colors.grey[300],
+        fillColor: Colors.grey[200],
+        filled: isAlbumTitleTextFieldFocus.value,
+      ),
+    );
+  }
+}