feat: Add UniqueGiftBackdropColors data class

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

@@ -666,6 +666,11 @@ const val upgradeStarCountField = "upgrade_star_count"
 const val payToUpgradeField = "pay_for_upgrade"
 const val paidMediaField = "paid_media"
 
+const val centerColorField = "center_color"
+const val edgeColorField = "edge_color"
+const val symbolColorField = "symbol_color"
+const val textColorField = "text_color"
+
 const val businessConnectionIdField = "business_connection_id"
 const val businessIntroField = "business_intro"
 const val businessLocationField = "business_location"

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

@@ -0,0 +1,24 @@
+package dev.inmo.tgbotapi.types
+
+import kotlinx.serialization.SerialName
+import kotlinx.serialization.Serializable
+
+/**
+ * This object describes the colors of the backdrop of a unique gift.
+ *
+ * @param centerColor The color in the center of the backdrop in RGB format
+ * @param edgeColor The color on the edges of the backdrop in RGB format
+ * @param symbolColor The color to be applied to the symbol in RGB format
+ * @param textColor The color for the text on the backdrop in RGB format
+ */
+@Serializable
+data class UniqueGiftBackdropColors(
+    @SerialName(centerColorField)
+    val centerColor: Int,
+    @SerialName(edgeColorField)
+    val edgeColor: Int,
+    @SerialName(symbolColorField)
+    val symbolColor: Int,
+    @SerialName(textColorField)
+    val textColor: Int
+)