feat: Enhanced sender avatars with gravatar and favicons integration (#685)

* feat: Enhanced sender avatars with gravatar and favicons integration

* chore: Remove unused known companies thumbnails

* feat(thumbnail): add IThumbnailService and refactor usage

- Introduced a new interface `IThumbnailService` for handling thumbnail-related functionalities.
- Registered `IThumbnailService` with its implementation `ThumbnailService` in the service container.
- Updated `NotificationBuilder` to use an instance of `IThumbnailService` instead of static methods.
- Refactored `ThumbnailService` from a static class to a regular class with instance methods and variables.
- Modified `ImagePreviewControl` to utilize the new `IThumbnailService` instance.
- Completed integration of `IThumbnailService` in the application by registering it in `App.xaml.cs`.

* style: Show favicons as squares

- Changed `hintCrop` in `NotificationBuilder` to `None` for app logo display.
- Added `FaviconSquircle`, `FaviconImage`, and `isFavicon` to `ImagePreviewControl` for favicon handling.
- Updated `UpdateInformation` method to manage favicon visibility.
- Introduced `GetBitmapImageAsync` for converting Base64 to Bitmap images.
- Enhanced XAML to include `FaviconSquircle` for improved UI appearance.

* refactor thumbnail service

* Removed old code and added clear method

* added prefetch function

* Change key from host to email

* Remove redundant code

* Test event

* Fixed an issue with the thumbnail updated event.

* Fix cutted favicons

* exclude some domain from favicons

* add yandex.ru

* fix buttons in settings

* remove prefetch method

* Added thumbnails propagation to mailRenderingPage

* Revert MailItemViewModel to object

* Remove redundant code

* spaces

* await load parameter added

* fix spaces

* fix case sensativity for mail list thumbnails

* change duckdns to google

* Some cleanup.

---------

Co-authored-by: Aleh Khantsevich <aleh.khantsevich@gmail.com>
Co-authored-by: Burak Kaan Köse <bkaankose@outlook.com>

Wino.Mail.ViewModels/Collections/WinoMailCollection.cs

@@ -129,11 +129,11 @@ public class WinoMailCollection
     private async Task HandleExistingThreadAsync(ObservableGroup<object, IMailItem> group, ThreadMailItemViewModel threadViewModel, MailCopy addedItem)
     {
         var existingGroupKey = GetGroupingKey(threadViewModel);
-        
+
         await ExecuteUIThread(() => { threadViewModel.AddMailItemViewModel(addedItem); });
 
         var newGroupKey = GetGroupingKey(threadViewModel);
-        
+
         if (!existingGroupKey.Equals(newGroupKey))
         {
             await MoveThreadToNewGroupAsync(group, threadViewModel, newGroupKey);
@@ -294,6 +294,25 @@ public class WinoMailCollection
         return null;
     }
 
+    public void UpdateThumbnails(string address)
+    {
+        if (CoreDispatcher == null) return;
+
+        CoreDispatcher.ExecuteOnUIThread(() =>
+        {
+            foreach (var group in _mailItemSource)
+            {
+                foreach (var item in group)
+                {
+                    if (item is MailItemViewModel mailItemViewModel && mailItemViewModel.MailCopy.FromAddress.Equals(address, StringComparison.OrdinalIgnoreCase))
+                    {
+                        mailItemViewModel.ThumbnailUpdatedEvent = !mailItemViewModel.ThumbnailUpdatedEvent;
+                    }
+                }
+            }
+        });
+    }
+
     /// <summary>
     /// Fins the item container that updated mail copy belongs to and updates it.
     /// </summary>