fixes in replies

tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/types/message/abstracts/GroupMessages.kt

@@ -10,9 +10,9 @@ sealed interface GroupContentMessage<T : MessageContent> : PublicContentMessage<
     override val chat: GroupChat
 }
 
-sealed interface ForumContentMessage<T : MessageContent> : GroupContentMessage<T> {
+sealed interface ForumContentMessage<T : MessageContent> : GroupContentMessage<T>, PossiblyTopicMessage {
     override val chat: ForumChat
-    val threadId: MessageThreadId
+    override val threadId: MessageThreadId
 }
 
 

tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/types/message/abstracts/PossiblyTopicMessage.kt

@@ -0,0 +1,7 @@
+package dev.inmo.tgbotapi.types.message.abstracts
+
+import dev.inmo.tgbotapi.types.MessageThreadId
+
+interface PossiblyTopicMessage : Message {
+    val threadId: MessageThreadId?
+}