feat: Add blog post "Running AI at Work: A Field Guide to Cost, Craft…

[dfberry]

This pull request adds a new draft blog post, "Running AI at Work: A Field Guide to Cost, Craft, and Guardrails," along with detailed prompts for supporting illustrations and diagrams. The post provides practical guidance for engineers and leaders on operationalizing AI, focusing on cost management, process hardening, and governance. It also includes structured prompts for generating consistent visual assets to accompany the content.

The most important changes are:

New Blog Post Content:

• Added website/blog/2026-06-27-from-prompt-to-production.md, a comprehensive draft post outlining strategies for running AI in production, covering cost optimization, process hardening, and governance/guardrails.

Illustration and Diagram Support:

• Included detailed JSON batch prompts and individual prompts for generating four watercolor illustrations and two Mermaid diagrams, ensuring visual consistency and alignment with the post's themes.
• Provided suggested Mermaid diagram source code for visualizing key concepts like the cost gradient and the graduation lifecycle.

Content Organization and Guidance:

• Documented naming conventions, style guidance, and image placement instructions to standardize media generation and embedding within the post.…, and Guardrails"