feat(chat): 캐릭터 목록에 Yandex 배너를 추가한다

Ultraworked with [Sisyphus]

https://github.com/code-yeongyu/oh-my-openagent

Co-authored-by: Sisyphus <clio-agent@sisyphuslabs.ai>

SodaLive/Sources/Chat/Character/CharacterView.swift

@@ -36,6 +36,12 @@ struct CharacterView: View {
                         }
                     }
 
+                    YandexInlineBannerView(
+                        placement: .chatCharacterList,
+                        horizontalPadding: 24
+                    )
+                    .padding(.vertical, -24)
+                     
                     // 인기 캐릭터 섹션
                     if !viewModel.popularCharacters.isEmpty {
                         CharacterSectionView(