Improved and documented the DocCModilleware middleware in the library target.

Library/Sources/Internal/Extensions/String+Formats.swift

@@ -9,8 +9,16 @@ extension String {
             static let data = "/data/%@"
             /// A format pattern used to generate relative paths that starts with the `/docs` string.
             static let docs = "/docs/%@"
+            /// A format pattern used to generate relative paths that finishes with the `/documentation` string.
+            static let documentation = "%@documentation"
+            /// A format pattern used to generate relative paths for JSON documentation files.
+            static let documentationJSON = "/data/documentation/%@.json"
             /// A format pattern used to generate relative paths that starts and finishes with the `/` string.
             static let folder = "/%@/"
+            ///A format pattern used to generate relative paths that finishes with the `/` string.
+            static let forwardSlash = "%@/"
+            /// A format pattern used to generate relative paths for index files.
+            static let index = "%@/%@/index.html"
             /// A format pattern used to generate relative paths that starts with the `/` string.
             static let root = "/%@"
         }