fix: ensure bizard-skill.zip is included in gh-pages deployment

[Copilot]

bizard-skill.zip was never reliably landing in the gh-pages branch because the zip was injected into _site/ after babelquarto::render_website() — outside Quarto's render pipeline. quarto publish gh-pages --no-render copies the render output but doesn't guarantee inclusion of post-render manual additions.

Changes

• _quarto.yml — add bizard-skill.zip to resources so Quarto copies it to _site/ as a first-class render artifact
• quarto-publish.yml — move zip generation to before babelquarto::render_website(); output to project root (./bizard-skill.zip) instead of _site/
• quarto-publish-update-cache.yml — same zip generation step added before babelquarto
• .gitignore — ignore bizard-skill.zip (generated file, not for source control)

Why this works

babelquarto::render_website() copies the entire project root into a temp dir before rendering. Quarto processes resources during render, copying bizard-skill.zip → _site/. babelquarto then copies _site/ back to the workspace. quarto publish --no-render deploys this properly-rendered _site/ including the zip.

# _quarto.yml
resources:
  - "files/*.csv"
  - "files/*.json"
  - "bizard-skill.zip"   # ← new

[github-actions]

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