Implemented a Product model in the library target.

Sources/DiscogsService/Public/Models/Product.swift

@@ -0,0 +1,48 @@
+// ===----------------------------------------------------------------------===
+//
+// This source file is part of the DiscogsService open source project
+//
+// Copyright (c) 2025 Röck+Cöde VoF. and the DiscogsService project authors
+// Licensed under Apache license v2.0
+//
+// See LICENSE for license information
+// See CONTRIBUTORS for the list of DiscogsService project authors
+//
+// SPDX-License-Identifier: Apache-2.0
+//
+// ===----------------------------------------------------------------------===
+
+import Foundation
+
+/// A type that represents a product that uses the ``Client`` client.
+public struct Product: Sendable {
+    
+    // MARK: Properties
+    
+    /// A camel-cased name of a product.
+    let name: String
+    
+    /// A URI link related to a product.
+    let url: String
+    
+    /// A semantic version of a product.
+    let version: String
+    
+    // MARK: Initializers
+    
+    /// Initializes this model.
+    /// - Parameters:
+    ///   - name: A camel-cased name of a product.
+    ///   - version: A URI link related to a product.
+    ///   - url: A semantic version of a product.
+    public init(
+        name: String,
+        version: String,
+        url: String
+    ) {
+        self.name = name
+        self.url = url
+        self.version = version
+    }
+
+}