Implemented the ArchiveList model in the library target.

Library/Sources/Internal/Models/ArchiveList.swift

@@ -0,0 +1,15 @@
+import Hummingbird
+
+struct ArchiveList: ResponseCodable {
+    
+    // MARK: Properties
+    
+    let archives: [String]
+    
+    // MARK: Initialisers
+    
+    init(_ archives: [String]) {
+        self.archives = archives
+    }
+    
+}