The Detroit Three automakers have abandoned small cars, but foreign manufacturers continue to embrace a compact market full of first-time buyers and enthusiasts. Toyota unveiled a U.S.-focused performance variant of its best-selling Corolla compact car Thursday night called the GR. That’s pronounced Grrrrr. Based on Corolla’s hatchback model, the GR will feature aggressive styling and an insane, 300-horsepower, turbocharged 3-cylinder engine shared with the wee GR Yaris that has been setting European streets on fire. Developed by the brand’s Gazoo Racing arm, the hot hatch joins other all-whee…