chore: scaffold v8 monorepo — npm workspaces, node:test, GitHub Actions CI

The v7 source at the repo root is untouched; v8 work lives in packages/.
See docs/v8.md for layout and status against the modernization plan.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_014NgfSjHE11oFpoSnLVKLXd

docs/v8.md

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+# choo v8 — branch notes
+
+This branch is the working tree for the v8 modernization effort. The v7 code
+at the repo root is untouched and stays authoritative until 8.0.0 ships;
+everything new lives under `packages/`.
+
+## Layout
+
+- `packages/core` — `@choojs/core`: the Choo class, same API as choo v7
+  (`use`/`route`/`start`/`mount`/`toString`/`emit`), ported to ESM. The
+  nano* internals are consolidated into `lib/` as attributed ports:
+  - `lib/bus.js` ← nanobus 4.5.0
+  - `lib/router.js` ← nanorouter 4.0.0 + wayfarer 7.0.1 (+ trie)
+  - `lib/cache.js` ← choo component/cache.js + nanolru 1.0.0
+  - `lib/raf.js` ← nanoraf 3.1.0, `lib/href.js` ← nanohref 3.1.0
+  - `lib/timing.js` ← nanotiming 7.3.1 (unified on global `performance`)
+  - `lib/dom.js` ← document-ready 2.0.1 + scroll-to-anchor 1.0.0
+  - `lib/query.js` — nanoquery replaced by `URLSearchParams`
+- `packages/html` — `@choojs/html`: the rendering package.
+  - `server.js` — server-side tagged template (← nanohtml 1.10.0 server,
+    transform branches removed; pure runtime)
+  - `morph.js` — ← nanomorph 5.4.3, consolidated to one module
+  - `browser.js` — **Phase 2**: runtime-only cached template tag (WeakMap
+    keyed on the template strings array, clone-based instantiation,
+    hydration that adopts server DOM). Throws until implemented.
+  - `raw.js` — mark pre-encoded strings
+
+## Status vs the modernization plan
+
+- [x] Phase 1: monorepo scaffold, ESM ports, choo v7 node test suite green
+      on `node --test` (Node ≥ 24), CI on GitHub Actions
+- [ ] Phase 2: browser renderer rewrite + hydration, `@choojs/component`
+- [ ] Phase 3: v8 wiring (`toStream`, devtools, codemod)
+- [ ] Phase 4: bankai v10 (Vite 8/Rolldown shell, SSR middleware,
+      103 Early Hints, service worker, precompression)
+- [ ] Phase 5: docs, examples, launch
+
+## Deliberate changes from v7
+
+- `choo()` still works without `new`; `Choo` is also a named export.
+- nanoquery → `URLSearchParams` (same output shape, repeated keys → arrays).
+- Assertions live in `lib/assert.js` so production builds can strip them.
+- Everything targets Node ≥ 24 and Baseline Widely Available browsers; there
+  is no compile step and no transpilation anywhere.
+
+## Attribution
+
+All ported modules are MIT-licensed work by the original choojs/nano*
+authors and contributors; per-file headers note the source package and
+version. This branch exists to carry that work forward, not to replace it.