Jack Dorsey issued an apology to Twitter employees past and present a day after its new owner, Elon Musk, fired half the social media company’s 7,500-member workforce. “Folks at Twitter past and present are strong and resilient,” the Twitter founder tweeted Saturday morning. “They will always find a way no matter how difficult the moment. I realize many are angry with me. I own the responsibility for why everyone is in this situation: I grew the company size too quickly. I apologize for that.” By June 30, 2013, shortly before the social media company went public, Twitter had approximately 2,00…