Add CreateEndpointCommand and Endpoint classes

Introduced the `CreateEndpointCommand` class as a placeholder for future implementation. Added the `Endpoint` class with properties `Active`, `Description`, and `Uri` to represent endpoint details. Included necessary `using` directives and organized the code under the `ReC.Application.Endpoints.Commands` namespace.

src/ReC.Application/Endpoints/Commands/CreateEndpointCommand.cs

@@ -0,0 +1,22 @@
+using System;
+using System.Collections.Generic;
+using System.ComponentModel.DataAnnotations;
+using System.ComponentModel.DataAnnotations.Schema;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace ReC.Application.Endpoints.Commands;
+
+public class CreateEndpointCommand
+{
+}
+
+public class Endpoint
+{
+    public bool Active { get; set; } = true;
+
+    public string? Description { get; set; }
+
+    public string Uri { get; set; } = null!;
+}