Add navigation settings, fix page generation

CHDataManagement/Model/Item/LocalizedPageId.swift

@@ -0,0 +1,25 @@
+
+struct LocalizedPageId: Hashable {
+
+    let language: ContentLanguage
+
+    let pageId: String
+}
+
+extension LocalizedPageId: Identifiable {
+
+    var id: String {
+        pageId + "-" + language.rawValue
+    }
+}
+
+extension LocalizedPageId: Comparable {
+
+    static func < (lhs: LocalizedPageId, rhs: LocalizedPageId) -> Bool {
+        lhs.id < rhs.id
+    }
+}
+
+extension LocalizedPageId: Equatable {
+
+}