v1.8.0: Docs section routes and a new icon

The findable-docs release.

Changed

• Docs sections at their own addresses: /docs/quickstart, /docs/glossary, and /docs/math. The section strip is real navigation (each section can be opened, bookmarked, and shared directly, with its own page title and description), and old /docs and /docs?tab= links redirect to the matching section.
• Machine-readable glossary: every term now carries a schema.org DefinedTermSet definition, and the sitemap and public/llms.txt point at the new section addresses. llms.txt also covers the baseline comparison and share features, and describes dice notation as displayed rather than typed.
• New app icon: a twenty-sided die sitting under a wooden table. The favicon, PWA icons, apple touch icon, and the social share card are all regenerated from it.

Full notes in the CHANGELOG.