Updates to site guidelines and AI/LLM tags

Hey folks, I've been having to perform an increasing number of moderation actions surrounding the vibecoding tag and AI/LLM related content. I started reading Lobsters because it had the most interesting viewpoints related to computing. During that time, I've found that this community is at it's best when it's trying to, in good faith, help others grow. In lieu of a larger and more rambling discussion on this point, we would like to try two changes encourage that behavior again and re-focus topicality around ensuring that content submitted to the site should, at a minimum, be respectful of a reader's time and intelligence.  The first adjustment is two updates to the about page, which try to provide a bit more clarity in what we consider topical and what constitutes self promotion: Intro: Lobsters is a computing-focused community centered around discussing links. Our goal is to learn, craft, collaborate, and share interesting viewpoints. The administrator is Peter Bhat Harkins ("p