feat: Add UniqueGiftSymbol data type

.gitignore

@@ -13,3 +13,4 @@ out/
 local.properties
 kotlin-js-store/
 secret.gradle
+.aider*

gradle/wrapper/gradle-wrapper.properties

@@ -2,4 +2,4 @@ distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-8.12.1-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.13-bin.zip

tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/types/Common.kt

@@ -5,6 +5,7 @@ import dev.inmo.tgbotapi.utils.BuiltinMimeTypes
 import kotlinx.serialization.Serializable
 import kotlin.jvm.JvmInline
 
+
 typealias ForwardSignature = String
 typealias ForwardSenderName = String
 typealias AuthorSignature = ForwardSignature
@@ -494,6 +495,7 @@ const val subscriptionPriceField = "subscription_price"
 const val copyTextField = "copy_text"
 const val giftField = "gift"
 const val giftsField = "gifts"
+const val rarityPerMilleField = "rarity_per_mille"
 
 const val pointField = "point"
 const val xShiftField = "x_shift"

tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/types/UniqueGiftSymbol.kt

@@ -0,0 +1,22 @@
+package dev.inmo.tgbotapi.types
+
+import dev.inmo.tgbotapi.types.files.Sticker
+import kotlinx.serialization.SerialName
+import kotlinx.serialization.Serializable
+
+/**
+ * This object describes the symbol shown on the pattern of a unique gift.
+ *
+ * @param name Name of the symbol
+ * @param sticker The sticker that represents the unique gift
+ * @param rarityPerMille The number of unique gifts that receive this model for every 1000 gifts upgraded
+ */
+@Serializable
+data class UniqueGiftSymbol(
+    @SerialName(nameField)
+    val name: String,
+    @SerialName(stickerField)
+    val sticker: Sticker,
+    @SerialName(rarityPerMilleField)
+    val rarityPerMille: Int
+)