Update Cosmos API to 1.21.8, configure Altitude Nexus repository, and adjust ProgressBookOpener for incomplete quests

src/main/java/com/alttd/altitudequests/util/ProgressBookOpener.java

@@ -41,8 +41,11 @@ public class ProgressBookOpener {
                 dailyQuest.getTagResolvers()
         );
         List<String> pages = new ArrayList<>(Config.PROGRESS_PAGES);
+        if (!dailyQuest.isDone()) {
+            pages.addAll(dailyQuest.getQuestPages());
+        }
         return (pages.stream()
                 .map(page -> miniMessage.deserialize(page, tagResolver))
                 .collect(Collectors.toList()));
     }
-}
+}