Re-label markdown TOC as "Quick Navigation" to clarify dual-TOC purpose

[Copilot]

• Understand the current documentation structure and identify the duplicate TOCs
• Re-label the markdown TOC to clarify its purpose for GitHub viewers
• Verify the change doesn't break documentation generation
• Update .gitignore to exclude generated documentation files
• Fix markdownlint MD013 line length error

Original prompt

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This section details on the original issue you should resolve

<issue_title>[Feature]: Multiple TOCs in Guide</issue_title>
<issue_description>### Problem Statement

The User Guide contains two Table of Content sections because one is in markdown and one is manually constructed in the Mermaid text.

Proposed Solution

The mermaid version is nice for users directly viewing the Markdown in GitHub, but the Pandoc generated one is more complete and cannot get out of date.

Possibly the right solution is to keep the Markdown section but re-label it.

Alternatives Considered

No response

Usage Examples

Benefits

Remove confusing duplicate of TOC.

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]: Multiple TOCs in Guide #61

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[Malcolmnixon]

@copilot Please fix the following error:
Error: docs/guide/guide.md:7:121 MD013/line-length Line length [Expected: 120; Actual: 168] https://github.com/DavidAnson/markdownlint/blob/v0.40.0/doc/md013.md

[Copilot]

@copilot Please fix the following error:
`Error: docs/guide/guide.md:7:121 MD013/line-length Line length [Expected: 120; Actual: 168] https://github.com/DavidAnson/markdownlint/blob/v0.40.0/doc/md013...

Fixed in commit 5b347bd. The long line has been split to comply with the 120-character limit.

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)