Updated Default TTS requests to use stores. Added a modify method for grouped save stores.

Store/IStore.cs

@@ -5,6 +5,7 @@ namespace HermesSocketServer.Store
         V? Get(K key);
         IDictionary<K, V> Get();
         Task Load();
+        bool Modify(K? key, Action<V> action);
         void Remove(K? key);
         Task<bool> Save();
         bool Set(K? key, V? value);