add ChatSettings

posts/src/commonMain/kotlin/models/ChatConfig.kt

@@ -0,0 +1,11 @@
+package dev.inmo.plaguposter.posts.models
+
+import dev.inmo.tgbotapi.types.ChatId
+import kotlinx.serialization.Serializable
+
+@Serializable
+data class ChatConfig(
+    val targetChatId: ChatId,
+    val sourceChatId: ChatId,
+    val cacheChatId: ChatId
+)