Rename draft files after the 'Title:' on their first line as lowercase hyphenated slugs, keeping contents.

Rename draft files after the 'Title:' on their first line as lowercase hyphenated slugs, keeping contents.: a task in agent-harbor-tasks (Harbor dataset). the files in drafts/ have useless names. rename each one after the Title: on its first line, lowercase with words joined by hyphens, .txt (e.g…