PARIS — The next big idea to light up the sharing economy may not come from a rule-bending Silicon Valley startup or a crowded American dorm room.Instead, it may very well come out of France.The country that was once famous for leaders celebrating the 35-hour work week is changing. Spurred on by a tech-driven sense of moment and opportunity, as well as an unemployment rate that has hovered around 10 percent for several years, the eurozone’s second-largest economy is working to seed its business environment with cash and talent incentives designed to lure startups and sharing economy companies.Macron: “I want France to be a start-up nation”“I want France to be a start-up nation; a nation that thinks and moves like a start-up,” President Emmanuel Macron said in an address to the sprawling VivaTech show. Macron could be considered a bit of a start-up himself, having put together his “La République En Marche” (Republic on the Move) party only last year in his first run for office.