Documented the IndexPrefix enumeration in the library target.

Library/Sources/Internal/Enumerations/IndexPrefix.swift

@@ -1,5 +1,8 @@
+/// An enumeration that represents the folders where articles and tutorials data and assets will be stored.
 enum IndexPrefix: String, CaseIterable {
+    /// A folder that contains all articles' assets and data generated is stored.
     case documentation
+    /// A folder that contains all tutorials' assets and data generated is stored.
     case tutorials
 }
 
@@ -10,7 +13,7 @@ extension IndexPrefix: Pathable {
     // MARK: Computed
     
     var path: String {
-        .init(format: .Format.pathRoot, rawValue)
+        .init(format: .Format.Path.root, rawValue)
     }
     
 }