add support of inaccessible message

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

@@ -287,6 +287,13 @@ internal data class RawMessage(
     }
 
     val asMessage: Message by lazy {
+        if (date.date == 0L) {
+            return@lazy InaccessibleMessage(
+                chat,
+                messageId
+            )
+        }
+
         try {
             chatEvent?.let { chatEvent ->
                 when (chat) {

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

@@ -19,6 +19,15 @@ interface Message : WithPreviewChatAndMessageId {
     val date: DateTime
 }
 
+@Serializable
+data class InaccessibleMessage(
+    override val chat: PreviewChat,
+    override val messageId: MessageId,
+) : Message {
+    override val date: DateTime
+        get() = DateTime.invoke(0L)
+}
+
 data class UnknownMessageType(
     override val messageId: MessageId,
     override val chat: PreviewChat,