📝 docs: add help links to issue reporting

[JoshuaKGoldberg]

PR Checklist

• [x] Addresses an existing open issue: fixes #56
• [x] That issue was marked as accepting prs
• [x] Steps in CONTRIBUTING.md were taken

Overview

Directs folks with questions over to the TypeScript Discord or to me on Twitter. I don't have anything more dedicated than those.