docs: add 8.2 routing DSL coverage to AI guidelines template

[lmajano]

Description

The AI coding-agent guidelines template (templates/ai/guidelines/core/coldbox.md) that ships with coldbox ai scaffolding still only documented the pre-8.x routing surface (route()/resources()/group()). This adds a new Routing subsection covering the ColdBox 8.1/8.2 additions: route middleware, middleware groups, route-level caching (.withCache()), Server-Sent Events, and AI/AI Gateway routing (toAi(), toMCP(), toAiGateway()).

No route-generator command exists in this repo today, so nothing was broken by 8.2 — this is purely filling a documentation gap so AI agents scaffolding ColdBox 8.2 apps have accurate routing examples to draw from.

Issues

Found during a ColdBox 8.2 release-readiness audit; no separate CLI issue was filed since this is docs-template-only.

Type of change

• Bug Fix
• Improvement
• New Feature
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update

Checklist

• My code follows the style guidelines of this project
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes

🤖 Generated with Claude Code

https://claude.ai/code/session_01D7vyEDCVLA9nFp6NrsajWL

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