Defined the DocumentrationFolder enumeration type in. the library target and also, conformed it to the Pathable protocol.

Sources/DocCMiddleware/Internal/Enumerations/DocumentationFolder.swift

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+// ===----------------------------------------------------------------------===
+//
+// 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
+//
+// ===----------------------------------------------------------------------===
+
+/// An enumeration that represents the documentation folders that could be generated by the `DocC` building process.
+enum DocumentationFolder: String, CaseIterable {
+    /// An article document, which can also be used for (source code generated) technical documentation as well.
+    case article = "documentation"
+    /// A tutorial document.
+    case tutorial = "tutorials"
+}
+
+// MARK: - Pathable
+
+extension DocumentationFolder: Pathable {
+    
+    // MARK: Computed
+    
+    var path: String {
+        .init(format: .Format.Path.root, rawValue)
+    }
+    
+}

Tests/DocCMiddleware/Tests/Internal/Enumerations/DocumentationFolderTests.swift

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+// ===----------------------------------------------------------------------===
+//
+// 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 Testing
+
+@testable import enum DocCMiddleware.DocumentationFolder
+
+@Suite("Documentation Type", .tags(.enumeration))
+struct DocumentationTypeTests {
+    
+    // MARK: Properties tests
+    
+#if swift(>=6.2)
+    @Test(arguments: zip(
+        DocumentationFolder.allCases,
+        Output.documentationFolderPaths
+    ))
+    func `path`(
+        `case`: DocumentationFolder,
+        expects result: String
+    ) {
+        assertPath(`case`, expects: result)
+    }
+#else
+    @Test("path", arguments: zip(
+        DocumentationType.allCases,
+        Output.documentationTypePaths
+    ))
+    func path(
+        `case`: DocumentationType,
+        expects result: String
+    ) {
+        assertPath(`case`, expects: result)
+    }
+#endif
+    
+}
+
+// MARK: - Assertions
+
+private extension DocumentationTypeTests {
+    
+    // MARK: Functions
+    
+    /// Asserts the path property based on a given ``DocumentationFolder`` enumeration case and an expected result.
+    /// - Parameters:
+    ///   - case: A representation of the ``DocumentationFolder`` enumeration
+    ///   - result: An expected result coming out of the property.
+    func assertPath(
+        _ case: DocumentationFolder,
+        expects result: String
+    ) {
+        // GIVEN
+        // WHEN
+        let output = `case`.path
+
+        // THEN
+        #expect(output == result)
+    }
+    
+}
+
+// MARK: - Constants
+
+extension Output {
+    /// A list of expected outputs for the paths of the ``DocumentationFolder`` enumeration cases.
+    static let documentationFolderPaths: [String] = ["/documentation", "/tutorials"]
+}