bench: @choojs/html vs nanohtml v1 vs µhtml v5, happy-dom + real Chromium

npm run bench (happy-dom, all three engines) and npm run bench:browser
(Playwright Chromium, the two ESM engines). Honest numbers recorded in
docs/v8.md: we create ~12% faster than µhtml in real Chromium (the
parse-once/clone design), µhtml updates in place ~5x faster than
fresh-tree + nanomorph (choo's architectural cost, mitigated by component
caching), and server strings are on par with nanohtml v1.

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

package.json

@@ -13,12 +13,15 @@
   "scripts": {
     "test": "node --test packages/core/test/ packages/html/test/ packages/component/test/",
     "test:e2e": "node --test test/e2e/",
-    "bench": "node bench/render.js"
+    "bench": "node bench/render.js",
+    "bench:browser": "node bench/real-browser.js"
   },
   "repository": "choojs/choo",
   "license": "MIT",
   "devDependencies": {
     "happy-dom": "^20.14.0",
-    "playwright": "^1.63.0"
+    "nanohtml": "^1.10.0",
+    "playwright": "^1.63.0",
+    "uhtml": "^5.0.9"
   }
 }