Replace shared email commands with MediatR notifications (#280)

web/backend/Features/Features.Users/Notifications/ConfirmationEmailResendRequestedNotification.cs

@@ -0,0 +1,14 @@
+using MediatR;
+
+namespace Features.Auth.Notifications;
+
+/// <summary>
+///     Published after a user requests a fresh confirmation link. Handled by Features.Emails to send the
+///     resend confirmation email.
+/// </summary>
+public record ConfirmationEmailResendRequestedNotification(
+    Guid UserId,
+    string FirstName,
+    string Email,
+    string ConfirmationToken
+) : INotification;