Add XML documentation for Handle method

Enhanced the `Handle` method in the `ResetEmailTemplateCommandHandler` class with XML documentation comments, including a summary and detailed parameter descriptions for better code clarity and maintainability.

EnvelopeGenerator.Application/EmailTemplates/Commands/Reset/ResetEmailTemplateCommandHandler.cs

@@ -22,6 +22,12 @@ public class ResetEmailTemplateCommandHandler : IRequestHandler<ResetEmailTempla
         _repository = repository;
     }
 
+    /// <summary>
+    /// 
+    /// </summary>
+    /// <param name="request"></param>
+    /// <param name="cancel"></param>
+    /// <returns></returns>
     public async Task Handle(ResetEmailTemplateCommand request, CancellationToken cancel)
     {
         var temps = request.Id is not null