Add charts and graphs agent post

[CATDAB]

Summary

• Add a post on chart rendering options for AI agents and Copilot Studio
• Compare Mermaid, Adaptive Card charts, Matplotlib via Azure Functions/MCP, and the new Copilot Studio experience
• Add chart screenshots and Nico Sprotti author metadata

Validation

• bundle exec jekyll build --quiet

[github-actions]

Blog preview check passed for c2e29eb.

The Jekyll site compiled successfully and generated previews for the newly added post.

• \_posts/2026\-06\-17\-matplotlib\-charts\-copilot\-studio\-agents\.md -> /mcscatblog/posts/matplotlib\-charts\-copilot\-studio\-agents/

Preview artifacts:

• Rendered HTML: download artifact
• Screenshots: download artifact

Open the workflow run

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