Implemented the RedirectURIUseCase use case in the library target.

Tests/DocCMiddleware/Types/Extensions/String+Constants.swift

@@ -0,0 +1,20 @@
+// ===----------------------------------------------------------------------===
+//
+// This source file is part of the Hummingbird DocC Middleware open source project
+//
+// Copyright (c) 2025 Röck+Cöde VoF. and the Hummingbird DocC Middleware project authors
+// Licensed under the EUPL 1.2 or later.
+//
+// See LICENSE for license information
+// See CONTRIBUTORS for the list of Hummingbird DocC Middleware project authors
+//
+// ===----------------------------------------------------------------------===
+
+extension String {
+    
+    // MARK: Constants
+    
+    /// A URI path to use as a redirection sample.
+    static let uriRedirection = "/some/redirect/path"
+    
+}