docs: guides section overhaul — fix existing + add 3 new tutorials (#5735)

* docs: fix guides section — sidebar ordering, broken links, position conflicts

- Add local-llm-on-mac.md to sidebars.ts (was missing after salvage PR)
- Reorder sidebar: tips first, then local LLM guide, then tutorials
- Fix 10 broken links in team-telegram-assistant.md (missing /docs/ prefix)
- Fix relative link in migrate-from-openclaw.md
- Fix installation link pointing to learning-path instead of installation
- Renumber all sidebar_position values to eliminate conflicts and match
  the explicit sidebars.ts ordering

* docs: add 3 new guides — cron automation, skills, delegation

New tutorial-style guides covering core features:

- automate-with-cron.md (261 lines): 5 real-world patterns — website
  monitoring with scripts, weekly reports, GitHub watchers, data
  collection pipelines, multi-skill workflows. Covers [SILENT] trick,
  delivery targets, job management.

- work-with-skills.md (268 lines): End-to-end skill workflow — finding,
  installing from Hub, configuring, creating from scratch with reference
  files, per-platform management, skills vs memory comparison.

- delegation-patterns.md (239 lines): 5 patterns — parallel research,
  code review, alternative comparison, multi-file refactoring,
  gather-then-analyze (execute_code + delegate). Covers the context
  problem, toolset selection, constraints.

Added all three to sidebars.ts in the Guides & Tutorials section.

website/docs/guides/python-library.md

@@ -1,5 +1,5 @@
 ---
-sidebar_position: 4
+sidebar_position: 5
 title: "Using Hermes as a Python Library"
 description: "Embed AIAgent in your own Python scripts, web apps, or automation pipelines — no CLI required"
 ---