Enable Mermaid diagram rendering in guide documentation

[Copilot]

The Pandoc build step was not configured to process Mermaid diagram blocks in the guide.

Changes

• Added --filter node_modules/.bin/mermaid-filter.cmd to the Pandoc invocation in .github/workflows/build_docs.yaml
• Uses Windows-specific .cmd extension to match the windows-latest runner
• Leverages existing mermaid-filter@1.4.7 dev dependency

The filter is a no-op when no Mermaid blocks are present, maintaining backward compatibility with existing documentation content.

Warning

Firewall rules blocked me from connecting to one or more addresses (expand for details)

I tried to connect to the following addresses, but was blocked by firewall rules:

• googlechromelabs.github.io
  • Triggering command: /usr/local/bin/node node install.mjs (dns block)
• https://storage.googleapis.com/chrome-for-testing-public/131.0.6778.204/linux64/chrome-linux64.zip
  • Triggering command: /usr/local/bin/node node install.mjs (http block)
• https://storage.googleapis.com/chromium-browser-snapshots/Linux_x64/1108766/chrome-linux.zip
  • Triggering command: /usr/local/bin/node node install.js (http block)

If you need me to access, download, or install something from one of these locations, you can either:

• Configure Actions setup steps to set up my environment, which run before the firewall is enabled
• Add the appropriate URLs or hosts to the custom allowlist in this repository's Copilot coding agent settings (admins only)

Original prompt

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This section details on the original issue you should resolve

<issue_title>[Feature]: Mermaid support for Guide</issue_title>
<issue_description>### Problem Statement

The Pandoc tool should make use of the mermaid filter

Proposed Solution

Add --filter node_modules/.bin/mermaid-filter.cmd to the pandoc invocation to enable the mermaid filter

Alternatives Considered

No response

Usage Examples

Benefits

The guide can support mermaid diagrams.

Priority

Low - Nice to have

Willingness to Contribute

Yes, I can submit a pull request

Additional Context

No response

Checklist

• I have searched existing issues to ensure this is not a duplicate
• I have provided a clear description of the feature
• I have explained why this feature would be useful</issue_description>

Comments on the Issue (you are @copilot in this section)

• Fixes [Feature]: Mermaid support for Guide #63

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