docs: move SkillOpt-Sleep into the guide; clean docs/sleep; fix guide link

Per maintainer request:
- Remove the internal/scratch docs/sleep/ tree (reports, raw logs, blog run
  JSON, sweep.jsonl) — 23 files — and the root PUBLISHING.md. These were
  working notes, not reference docs.
- Take the dedicated SkillOpt-Sleep content out of the main README (News bullet
  + section) and host it in the rendered guide instead: new section 9 in
  docs/guideline.html (deployment companion, the three plugins, opt-in
  experience replay / dream rollouts) with a sidebar entry.
- Fix the README's opening reference so "Documentation & Reproduction Guide"
  links directly to the rendered GitHub Pages page, not the raw .html source.
- Repoint the now-removed docs/sleep links in the plugin READMEs to the guide
  section.

The plugin code (plugins/, skillopt_sleep/) is unchanged; only docs move.

Co-Authored-By: Claude Opus 4 <noreply@anthropic.com>

plugins/codex/README.md

@@ -9,7 +9,7 @@ as the Claude Code plugin (`skillopt_sleep`), wrapped for Codex.
 > [gbrain-evals](https://github.com/garrytan/gbrain-evals) `skillopt-v1`
 > benchmark, a deliberately deficient skill goes **0.00 → 1.00** on a held-out
 > set with the Codex backend (incl. the tool-use seed via a real tool loop).
-> See [`../../docs/sleep/FINAL_REPORT.md`](../../docs/sleep/FINAL_REPORT.md).
+> See [the SkillOpt-Sleep guide section](https://microsoft.github.io/SkillOpt/docs/guideline.html#sleep).
 
 ## What Codex supports (and what we use)
 
@@ -59,7 +59,7 @@ back to Claude Code transcripts. Default backend is `mock` (no API spend).
 `--backend codex` uses your Codex budget for real improvement. All the
 controllable knobs (`--gate on|off`, `--rollouts-k`, `--budget-tokens`,
 `--preferences`, optimizer/target split) work identically — see
-[`../../docs/sleep/CONTROLLABLE_DREAMING.md`](../../docs/sleep/CONTROLLABLE_DREAMING.md).
+[the SkillOpt-Sleep guide section](https://microsoft.github.io/SkillOpt/docs/guideline.html#sleep).
 
 ## Notes / status