Refactor/static UI asciidoc wip (#25)

* refactor(ui): static HTML/JS UI; README->AsciiDoc; launcher + container

- Remove the ReScript SPA (ui/src/App.res, ui/rescript.json, ui/deno.json)
- Replace with vanilla static UI (ui/public/app.js, reworked index.html/styles.css)
- Add ui/launcher/, ui/INSTALL.sh, ui/README.adoc, playground/README.adoc
- Add containers/Containerfile.chainguard
- Convert README headings from Markdown to AsciiDoc

WIP snapshot committed during the 2026-05-16 estate sync (rebased onto
current upstream main).

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

* chore: add .claude project scaffolding

Agent/project config carried alongside the WIP snapshot.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

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Co-authored-by: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Author: hyperpolymath