feat(chat-room) 채팅방 골격 추가

SodaLive/Sources/Chat/Talk/Room/Enter/ChatRoomEnterResponse.swift

@@ -0,0 +1,16 @@
+//
+//  ChatRoomEnterResponse.swift
+//  SodaLive
+//
+//  Created by klaus on 9/2/25.
+//
+
+struct ChatRoomEnterResponse: Decodable {
+    let roomId: Int64
+    let character: CharacterInfo
+    let messages: [ServerChatMessage]
+    let hasMoreMessages: Bool
+    let totalRemaining: Int
+    let nextRechargeAtEpoch: Int64?
+    let bgImageUrl: String?
+}