Dallas has a history of liking coffee from Austin, and it’s about to get another fix: Austin roaster Summer Moon will open its first Dallas-area coffee shop in the busy-busy suburb of Frisco. This is not the shiny new Frisco of Dallas Cowboys headquarters fame — it is instead historic downtown Frisco, with its charming brick storefronts. Summer Moon will open at 6943 Main St., in the old Horse Hardware, a 10-year-old store that sold…