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/Authenticators/GmailAuthenticator.cs

@@ -3,6 +3,7 @@ using System.Net.Http;
 using System.Text;
 using System.Text.Json.Nodes;
 using System.Threading.Tasks;
+using CommunityToolkit.Mvvm.Messaging;
 using Wino.Core.Domain;
 using Wino.Core.Domain.Entities;
 using Wino.Core.Domain.Enums;
@@ -11,6 +12,7 @@ using Wino.Core.Domain.Interfaces;
 using Wino.Core.Domain.Models.Authentication;
 using Wino.Core.Domain.Models.Authorization;
 using Wino.Core.Services;
+using Wino.Messaging.Server;
 
 namespace Wino.Core.Authenticators
 {
@@ -24,6 +26,8 @@ namespace Wino.Core.Authenticators
 
         public override MailProviderType ProviderType => MailProviderType.Gmail;
 
+        public bool ProposeCopyAuthURL { get; set; }
+
         private readonly INativeAppService _nativeAppService;
 
         public GmailAuthenticator(ITokenService tokenService, INativeAppService nativeAppService) : base(tokenService)
@@ -121,6 +125,11 @@ namespace Wino.Core.Authenticators
 
             Uri responseRedirectUri = null;
 
+            if (ProposeCopyAuthURL)
+            {
+                WeakReferenceMessenger.Default.Send(new CopyAuthURLRequested(authorizationUri));
+            }
+
             try
             {
                 responseRedirectUri = await _nativeAppService.GetAuthorizationResponseUriAsync(this, authorizationUri);