Add ASCII chart guidance and route chart requests in agentic-workflows dispatcher

[Copilot]

GitHub Agentic Workflows lacked dedicated instructions for generating ASCII charts that render reliably in GitHub markdown surfaces. This change adds a focused guidance document and wires dispatcher routing so chart-generation requests consistently load it.

• New guidance: .github/aw/asciicharts.md

  • Adds a compact ASCII chart playbook for GitHub issues/comments/discussions.
  • Defines hard rendering constraints (fenced blocks, spaces-only, width/height targets, mobile-safe layout).
  • Standardizes preferred glyphs, chart types (sparkline, bars, table+trend), alignment rules, scaling behavior, and output priorities.

• Dispatcher routing update: .github/agents/agentic-workflows.agent.md

  • Adds an explicit routing entry for markdown ASCII chart rendering requests.
  • Adds a dedicated “Render ASCII Charts in Markdown” prompt section with reference link and concrete use cases.

• Example usage (from new guidance)

  Svc      P95   Trend
  API      84ms  ▁▂▃▄▅▆█
  DB       12ms  ▁▁▂▂▃▄▅
  Cache    4ms   ▁▁▁▁▂▂▃
  

[Copilot]

Pull request overview

Adds guidance for compact in-markdown chart rendering and updates the agentic-workflows dispatcher to route chart-related requests to it.

Changes:

• Added a new ASCII chart guidance document.
• Added dispatcher routing and use cases for markdown chart rendering.
• Updated a generated workflow lock env entry.

Show a summary per file

File	Description
.github/aw/asciicharts.md	Adds ASCII chart rendering guidance for GitHub markdown surfaces.
.github/agents/agentic-workflows.agent.md	Routes chart-rendering requests to the new guide.
.github/workflows/blog-auditor.lock.yml	Adds engine metadata to a setup step.

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• Files reviewed: 3/3 changed files
• Comments generated: 1