refactor: move files

Endpoint/Models/ErrorResponseVm.cs

@@ -0,0 +1,18 @@
+namespace Mirea.Api.Endpoint.Models;
+
+/// <summary>
+/// A class for providing information about an error
+/// </summary>
+public class ErrorResponseVm
+{
+    /// <summary>
+    /// The text or translation code of the error. This field may not contain information in specific scenarios.
+    /// For example, it might be empty for HTTP 204 responses where no content is returned or if the validation texts have not been configured.
+    /// </summary>
+    public required string Error { get; set; }
+    /// <summary>
+    /// In addition to returning the response code in the header, it is also duplicated in this field.
+    /// Represents the HTTP response code.
+    /// </summary>
+    public required int Code { get; set; }
+}