Use DTOs to return API requests instead of Database Schema types.

Make use of IHttpStatusCodeResults

API/Controllers/DTOs/Author.cs

@@ -0,0 +1,17 @@
+using System.ComponentModel;
+using System.ComponentModel.DataAnnotations;
+
+namespace API.Controllers.DTOs;
+
+/// <summary>
+/// The <see cref="API.Schema.MangaContext.Author"/> DTO
+/// </summary>
+public record Author(string Key, string Name) : Identifiable(Key)
+{
+    /// <summary>
+    /// Name of the Author.
+    /// </summary>
+    [Required]
+    [Description("Name of the Author.")]
+    public string Name { get; init; } = Name;
+}