Function add_to_wishlist 

pub fn add_to_wishlist(
    state: State<'_, AppState>,
    id: String,
    name: String,
    cover_url: Option<String>,
    store_url: Option<String>,
    current_price: Option<f64>,
    itad_id: Option<String>,
) -> Result<String, AppError>

Adiciona um jogo à lista de desejos.