PARIS — From tentative strands cast between the courts of Louis XIV and King Narai of Siam to this year’s 170th anniversary of official diplomatic ties, France and Thailand have woven a dialogue of mutual admiration and creative exchanges. How the Asian kingdom’s Queen Mother Sirikit wove these shared threads of art, attire and craft into a rich cultural and diplomatic language is explored in “Royal Thai dress, from tradition to modernity,” an exhibition opening Tuesday and running through Nov. 1 at the Musée des Arts Décoratifs. Spread over 7,500 square feet, there are nearly 200 items on display, spanning garments and accessories as well as textiles, objects and photographs. Among them is a group of royal gowns, coats and accessories usually treated as national treasures and exhibited for the first time outside of Thailand . You May Also Like Outfits from Queen Sirikit’s wardrobe.…