release: v3.18.2 - Steinberger Practitioner Insight

Add Peter Steinberger (PSPDFKit Founder, Moltbot Creator) to Practitioner
Insights with model-agnostic workflow patterns.

Changes:
- Add Steinberger entry in guide/ai-ecosystem.md (stream monitoring,
  multi-project juggling, fresh context validation, iterative exploration)
- Complete evaluation in docs/resource-evaluations/steinberger-inference-speed.md
  (score 3/5, fact-checked GPT-5.2, validated credentials)
- Update docs/resource-evaluations/README.md (15→16 evaluations)
- Add practitioner_steinberger references in machine-readable/reference.yaml
- Version bump 3.18.1 → 3.18.2 (VERSION + sync all docs)
- Update CHANGELOG.md with detailed v3.18.2 entry
- Update README.md evaluations count (22→25)

Scope: Model-agnostic patterns only, zero model comparisons.
Source: https://steipete.me/posts/2025/shipping-at-inference-speed

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

guide/cheatsheet.md

@@ -6,7 +6,7 @@
 
 **Written with**: Claude (Anthropic)
 
-**Version**: 3.18.0 | **Last Updated**: January 2026
+**Version**: 3.18.2 | **Last Updated**: January 2026
 
 ---
 
@@ -484,4 +484,4 @@ where.exe claude; claude doctor; claude mcp list
 
 **Author**: Florian BRUNIAUX | [@Méthode Aristote](https://methode-aristote.fr) | Written with Claude
 
-*Last updated: January 2026 | Version 3.18.0*
+*Last updated: January 2026 | Version 3.18.2*