PARIS — If there was one message over the couture weekend, it was pants, pants, pants. Every collection had them — Chanel, Versace, Lacroix, Dior and Cardin — and Yves Saint Laurent and Emanuel Ungaro are promising more. They came high-waisted, cuffed, draped, skinny and wide, and almost always worn with heels. For more on the couture, see pages 6 to 9.