Move CSS and JS to src folders

[enf0rc3]

Closes NES-257

What

The CDN now serves fresh HTML, so main.css, vars.css and the site JS can live in src/ and be bundled like everything else. Previously they sat in public/ so clients holding HTML cached for up to 7 days could still resolve the original /docs/css/ and /docs/js/ paths.

• public/docs/css/{main,vars}.css → src/styles/
• public/docs/js/** → src/scripts/ (joins the existing theme-switcher.ts)
• Imports updated in HtmlHead.astro, Search.astro, src/layouts/Default.astro and src/themes/octopus/layouts/{Default,Search}.astro
• package.json prettier scripts: dropped the public/docs/js/** and public/docs/css/** globs, since src/** now covers these files. The only CSS left under public/docs/css is the vendored Font Awesome bundle.
• cspell.json ignore path moved from public/docs/js/** to src/scripts/**

Font Awesome CSS and webfonts stay in public/docs/css/fa — the @font-face rules in vars.css point at them and the webfonts keep their stable, cacheable paths.

public/css/report.css also stays put; the report pages link it by URL rather than importing it.

Single commit, pure renames

Everything is one commit of git mv operations. git show --stat -M shows all 27 moved files with 0 content changes, so other in-flight PRs touching these files rebase cleanly.

Verification

• pnpm build succeeds (2697 pages)
• Built pages reference the hashed bundles: /docs/_astro/components.BPDC2879.css, /docs/_astro/Default.astro_...DFIbMPWK.js, plus the dynamic-import chunks (code-blocks, detail-tabs, figures, headers, search-dialog, synonyms, youtube)
• /docs/css/fa/css/*.css still emitted and linked
• /docs/css/main.css and /docs/js/ no longer emitted, which is the intent of this change

Note: prettier --check reports pre-existing formatting drift across src/ (including files untouched here), so I did not run --write — that would have buried the renames.

🤖 Generated with Claude Code

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