Ability to copying authorization URL for Gmail (#375)

* Implemented copying auth URL for Gmail authentication.

* Update Button icon and add row spacing in Flyout grid

The icon used in the Button.Content has been updated to a new
design and is now wrapped inside a Viewbox with a width of 20
to ensure proper scaling. Additionally, the Grid inside the
Flyout now includes RowSpacing="12" to improve visual separation
between rows.

Wino.Core.UWP/Services/NativeAppService.cs

@@ -156,7 +156,9 @@ namespace Wino.Services
             await taskbarManager.RequestPinCurrentAppAsync();
         }
 
-        public async Task<Uri> GetAuthorizationResponseUriAsync(IAuthenticator authenticator, string authorizationUri, CancellationToken cancellationToken = default)
+        public async Task<Uri> GetAuthorizationResponseUriAsync(IAuthenticator authenticator,
+                                                                string authorizationUri,
+                                                                CancellationToken cancellationToken = default)
         {
             if (authorizationCompletedTaskSource != null)
             {