add MessageContent.Companion#serializationModule

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

@@ -1,3 +1,39 @@
 package dev.inmo.tgbotapi.types.message.content.abstracts
 
-interface MessageContent: ResendableContent
+import dev.inmo.tgbotapi.types.message.content.*
+import dev.inmo.tgbotapi.types.message.content.media.*
+import dev.inmo.tgbotapi.types.message.payments.InvoiceContent
+import kotlinx.serialization.modules.*
+
+interface MessageContent: ResendableContent {
+    companion object {
+        fun serializationModule(
+            additionalBuilder: PolymorphicModuleBuilder<MessageContent>.() -> Unit = {}
+        ) = SerializersModule {
+            polymorphic(MessageContent::class) {
+
+                subclass(ContactContent::class)
+                subclass(VenueContent::class)
+                subclass(PollContent::class)
+                subclass(DiceContent::class)
+                subclass(TextContent::class)
+
+                subclass(LiveLocationContent::class)
+                subclass(StaticLocationContent::class)
+
+                subclass(PhotoContent::class)
+                subclass(VideoContent::class)
+                subclass(AudioContent::class)
+                subclass(DocumentContent::class)
+
+                subclass(VoiceContent::class)
+                subclass(VideoNoteContent::class)
+                subclass(AnimationContent::class)
+                subclass(StickerContent::class)
+                subclass(InvoiceContent::class)
+
+                additionalBuilder()
+            }
+        }
+    }
+}