sstack 1.1.0

• Renamed from agent-skills to sstack (sergio stack). GitHub redirects the old repository URLs; the documentation site moved to https://geiserx.github.io/sstack/.
• Installable as a Claude Code plugin: /plugin marketplace add GeiserX/sstack, then /plugin install sstack@sstack. Plugin skills are namespaced, as in /sstack:file-pr.
• scripts/install.sh links the skills (and with --hooks the sergio-loop runtime) in one command, replacing the installer that was pasted into the docs. It now also links sergio_loop_registration.py, which the SessionStart hook imports.
• New skills: full-loop (sergio-loop to done, then refine-loop) and github-video-embed (videos that play inline on GitHub).
• file-pr no longer requests reviewers and keeps provenance in one References section.
• eli5, help-decide, docs-loop and refine-loop trigger on the user rather than one named person.
• The runtime's default accounts folder is now ~/.config/sstack/accounts (SERGIO_LOOP_ACCOUNTS_DIR still overrides it). Point it at your accounts folder, or set the variable, before upgrading.
• The validator checks that every skill has a README row and that the plugin and marketplace versions match.