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/claude-code/README.md

@@ -92,7 +92,7 @@ Both took a brief-writer with no risks section / no confidence level and, within
 into the protected `LEARNED` block, nothing else touched. The Codex 2-night
 trace even shows the optimizer **diagnosing its own residual failure** and
 adding a meta-rule to fix it. Full writeup + reproduction:
-[`docs/sleep/real_api_results.md`](../docs/sleep/real_api_results.md).
+[the SkillOpt-Sleep guide section](https://microsoft.github.io/SkillOpt/docs/guideline.html#sleep).
 
 Reproduce:
 
@@ -115,7 +115,7 @@ python -m skillopt_sleep.experiments.run_experiment --persona programmer  --asse
 
 Each prints the held-out score rising from baseline toward 1.0 as the gate
 accepts the general rules your tasks need, and confirms the gate **rejects** an
-injected harmful edit. Recorded output: [`docs/sleep/experiment_results.md`](../docs/sleep/experiment_results.md).
+injected harmful edit. Recorded output: [the SkillOpt-Sleep guide section](https://microsoft.github.io/SkillOpt/docs/guideline.html#sleep).
 
 ## Schedule it nightly