Documented the AmiiboClient enumeration and the AmiiboServiceError error in the library target.

Sources/Public/Enumerations/AmiiboClient.swift

@@ -0,0 +1,21 @@
+//===----------------------------------------------------------------------===
+//
+// This source file is part of the AmiiboService open source project
+//
+// Copyright (c) 2024-2025 Röck+Cöde VoF. and the AmiiboAPI project authors
+// Licensed under the EUPL 1.2 or later.
+//
+// See LICENSE for license information
+// See CONTRIBUTORS for the list of AmiiboAPI project authors
+//
+//===----------------------------------------------------------------------===
+
+/// A concrete representation of the types of client that a ``AmiiboService`` service can utilize.
+/// 
+/// > important: This enumeration has been defined as a way to avoid exposing the `APIClient` protocol outside the boundaries of this library.
+public enum AmiiboClient {
+    /// A live Amiibo client to interact with the online service.
+    case live(AmiiboLiveClient = .init())
+    ///A mock Amiibo client, for testing purposes.
+    case mock(AmiiboMockClient)
+}

Sources/Public/Errors/AmiiboServiceError.swift

@@ -10,12 +10,19 @@
 //
 //===----------------------------------------------------------------------===
 
+/// A representation of all the possible errors that the ``AmiiboService`` service could throw.
 public enum AmiiboServiceError: Error {
+    /// A bad request has been given to the client.
     case badRequest
+    /// A response cannot be decoded.
     case decoding
+    /// An online service is not currently available.
     case notAvailable
+    /// A response cannot be found.
     case notFound
+    /// An undocumented/unsupported error.
     case undocumented(_ statusCode: Int)
+    /// An unknown error.
     case unknown
 }