Updated the existing types to a new folder structure in the sample target.

Samples/HummingbirdDocC/App/Builders/AppBuilder.swift

@@ -0,0 +1,51 @@
+// ===----------------------------------------------------------------------===
+//
+// 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
+//
+// ===----------------------------------------------------------------------===
+
+import class Hummingbird.Router
+
+import protocol Hummingbird.ApplicationProtocol
+
+import struct Hummingbird.Application
+import struct Hummingbird.BindAddress
+import struct Logging.Logger
+
+struct AppBuilder {
+    
+    // MARK: Properties
+    
+    /// A type that interacts with the logging system.
+    private let logger: Logger
+    
+    // MARK: Initializers
+    
+    /// Initializes this builder.
+    /// - Parameter logger: A type that interacts with the logging system.
+    init(logger: Logger) {
+        self.logger = logger
+    }
+    
+    // MARK: Functions
+    
+    func callAsFunction(
+        _ arguments: AppArguments
+    ) -> some ApplicationProtocol {
+        let router = Router()
+
+        return Application(
+            router: router,
+            configuration: .init(
+                address: .hostname(arguments.hostname, port: arguments.port)
+            ),
+            logger: logger
+        )
+    }
+}