Add random tagged filtering for AI quotes

[jrddunbr]

Motivation

• Rotate the AI quotes in randomized order instead of always stepping through the Markdown source so the page feels fresh on each pass.
• Provide a simple tagging system so visitors can filter the AI quotes by themes like code, rpg, and human interaction.

Description

• Add tag UI and per-quote tag chips to ai-quotes.html, and document the Tags: Markdown convention in the page copy.
• Parse Tags: lines from ai-quotes.md, attach tags to each parsed quote, and build a shuffled quote queue that reshuffles between passes while trying to avoid immediate repeats.
• Make per-quote tag chips and global tag-filter buttons clickable so selecting a tag rebuilds the queue and shows only matching quotes.
• Add suggested tags to all 21 existing quotes in ai-quotes.md and add CSS styles for filter buttons and quote tag chips in style.css.

Testing

• Ran git diff --check and it produced no syntax/whitespace errors. (success)
• Extracted the page script and ran node --check /tmp/ai-quotes.js to validate the client-side JS syntax. (success)
• Served the site locally with python3 -m http.server 8000 and used a Python assertion script plus curl to verify the page contains the random-order rotator markup, the tag filter area, per-quote tag chips, the shuffle/matching functions, and that ai-quotes.md contains 21 Tags: entries. (success)
• Attempted npx playwright --version for screenshot/browser testing, but npm registry access returned 403 Forbidden in this environment so browser tooling could not be installed. (warning)

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Codex Task