dsh-asciinema: DSH Plugin: Terminal Output Recording and Offline Replay

`dsh-asciinema` is a DSH plugin designed to address terminal output recording and sharing in agent development. It records terminal output in asciinema v2 format and provides a fully standalone offline replay player with HTML export support. Core features include `term_rec` (record), `term_play` (replay), and `term_cat` (convert to text), with support for input control, event truncation, and privacy protection. It requires Node.js >= 23.6.0 for installation, is configured via `cordis.yml`, and enables fully local processing without external services.