Adding Smtp section in appsettings, registering IEmailSender as an email service and ofc the MailKit nuget in Infrastructure proj

src/Umbraco.Web.UI.NetCore/appsettings.json

@@ -116,6 +116,16 @@
                     "Replacement": ""
                 }
             ]
+        },
+        "Global": {
+            "Smtp": {
+                "From": "noreply@example.com",
+                "Host": "127.0.0.1",
+                "Port": 25,
+                "UserName": "username",
+                "Password": "password",
+                "DeliveryMethod": "network"
+            }
         }
     }
   }