Retirees from around the world are settling in Chiang Mai, a northern Thai city known for its affordability, safety, and laid-back lifestyle.Amanda Goh/Business InsiderFor several months each year, smoke from agricultural fires blankets Chiang Mai, a city in northern Thailand. But when Arinjay Jain moved there in 2024, he was too excited about his new life to worry about the haze."I landed here in the worst possible time, but I still loved it," …