Dear Sophie: My co-founder’s a green card applicant who just got laid off. Now what? Here’s another edition of “Dear Sophie,” the advice column that answers immigration-related questions about working at technology companies. “Your questions are vital to the spread of knowledge that allows people all over the world to rise above borders and pursue their dreams,” says Sophie Alcorn, a Silicon Valley immigration attorney. “Whether you’re in people ops, a founder or seeking a job in Silicon Valley, I would love to answer your questions in my next column.” TechCrunch+ members receive access to weekly “Dear Sophie” columns; use…