start add InputStoryContent

tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/types/stories/InputStoryContent.kt

@@ -0,0 +1,28 @@
+package dev.inmo.tgbotapi.types.stories
+
+import dev.inmo.tgbotapi.requests.abstracts.MultipartFile
+import dev.inmo.tgbotapi.types.photoField
+import kotlinx.serialization.SerialName
+import kotlinx.serialization.Serializable
+
+sealed interface InputStoryContent {
+    sealed interface Type {
+        val name: String
+    }
+    val type : Type
+    val media: Pair<String, MultipartFile>
+
+    @Serializable
+    data class Photo (
+        @SerialName(photoField)
+        val photo: MultipartFile
+    ) : InputStoryContent {
+        override val type: Type
+            get() = Companion
+
+        companion object : Type {
+            override val name: String
+                get() = "photo"
+        }
+    }
+}