feat: Implement interactive quest command allowing users to view active/available quests and accept new ones.

shared/modules/quest/quest.service.ts

@@ -118,5 +118,20 @@ export const questService = {
                 quest: true,
             }
         });
+    },
+
+    getAvailableQuests: async (userId: string) => {
+        const userQuestIds = (await DrizzleClient.query.userQuests.findMany({
+            where: eq(userQuests.userId, BigInt(userId)),
+            columns: {
+                questId: true
+            }
+        })).map(uq => uq.questId);
+
+        return await DrizzleClient.query.quests.findMany({
+            where: (quests, { notInArray }) => userQuestIds.length > 0
+                ? notInArray(quests.id, userQuestIds)
+                : undefined
+        });
     }
 };