External files, improve page generation

CHDataManagement/Model/Page.swift

@@ -98,6 +98,13 @@ extension Page: Hashable {
     }
 }
 
+extension Page: Comparable {
+
+    static func < (lhs: Page, rhs: Page) -> Bool {
+        lhs.id < rhs.id
+    }
+}
+
 extension Page: DateItem {
 
 }