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

Make use of IHttpStatusCodeResults

API/Controllers/DTOs/MangaConnectorId.cs

@@ -0,0 +1,38 @@
+using System.ComponentModel;
+using System.ComponentModel.DataAnnotations;
+using API.Schema.MangaContext;
+
+namespace API.Controllers.DTOs;
+
+/// <summary>
+/// <see cref="MangaConnectorId{T}"/> DTO
+/// </summary>
+public sealed record MangaConnectorId(string Key, string MangaConnectorName, string ForeignKey, string? WebsiteUrl, bool UseForDownload) : Identifiable(Key)
+{
+    /// <summary>
+    /// Name of the Connector
+    /// </summary>
+    [Required]
+    [Description("Name of the Connector")]
+    public string MangaConnectorName { get; init; } = MangaConnectorName;
+    
+    /// <summary>
+    /// Key of the referenced DTO
+    /// </summary>
+    [Required]
+    [Description("Key of the referenced DTO")]
+    public string ForeignKey { get; init; } = ForeignKey;
+    
+    /// <summary>
+    /// Website Link for reference, if any
+    /// </summary>
+    [Description("Website Link for reference, if any")]
+    public string? WebsiteUrl { get; init; } = WebsiteUrl;
+    
+    /// <summary>
+    /// Whether this Link is used for downloads
+    /// </summary>
+    [Required]
+    [Description("Whether this Link is used for downloads")]
+    public bool UseForDownload { get; init; } = UseForDownload;
+}