feat(chat-room) 채팅방 골격 추가

SodaLive/Sources/Chat/Talk/Room/Message/AiMessageItemView.swift

@@ -0,0 +1,18 @@
+//
+//  AiMessageItemView.swift
+//  SodaLive
+//
+//  Created by klaus on 9/2/25.
+//
+
+import SwiftUI
+
+struct AiMessageItemView: View {
+    var body: some View {
+        Text(/*@START_MENU_TOKEN@*/"Hello, World!"/*@END_MENU_TOKEN@*/)
+    }
+}
+
+#Preview {
+    AiMessageItemView()
+}