added Category.cs

Src/VideoGameQuotes.Api/Category.cs

@@ -0,0 +1,15 @@
+using System;
+using System.ComponentModel.DataAnnotations;
+using Portoa.Persistence;
+
+namespace VideoGameQuotes.Api {
+	public class Category : Entity<Category, int> {
+		public Category() {
+			Created = DateTime.UtcNow;
+		}
+
+		public virtual DateTime Created { get; set; }
+		[Required, StringLength(255)]
+		public virtual string Name { get; set; }
+	}
+}