Prepare the repository for a public release

- docs/deployment.md: step-by-step Docker deployment for anyone (setup,
  configuration, LAN/HTTPS/VPN access, adding manga, operation, prebuilt
  images, backups, peering, troubleshooting, rules for agents).
- deploy/circus.sh: host helper without Node (status, up/down with queue
  pause, logs, pause/resume, update, rescan, restore-test); deploy/compose.https.yml
  + Caddyfile for automatic HTTPS.
- README rewritten for public readers (Docker first, sources/copyright note,
  docs index); AGENTS.md + CLAUDE.md for contributors and coding agents.
- Removed notes about one particular installation (Windows host, handoffs,
  audits of a private library, benchmarks with local paths, wishlist, reading
  map) and the unused ops/proxmox templates; generalized remaining mentions of
  hosts, VPN and Windows-only commands.
- Defaults: TZ and reading time zone UTC; .gitattributes keeps shell/YAML LF.
- Personal agent coordination files are git-ignored (CLAUDE.local.md,
  .claude/skills/manga-org/).

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

docs/discovery.md

@@ -49,11 +49,11 @@ No scraper queue edit occurs.
 
 From the project directory:
 
-```powershell
+```bash
 node discovery/cli.js run --dry-run --data data --show
 npm run test:reader
 docker build -t mangacircus:discovery-test .
-$env:APP_IMAGE='mangacircus:discovery-test'; npm run test:discovery-ui
+APP_IMAGE=mangacircus:discovery-test npm run test:discovery-ui
 ```
 
 The dry run reads `db.json`, a saved library index if present, Greatest, and