rebrand: buuh — a friendly public fork under the uhhm org

Packages renamed to the @uhhm scope (@uhhm/buuh, @uhhm/buuh-html,
@uhhm/buuh-component, @uhhm/buuh-devtools, @uhhm/buuh-migrate,
@uhhm/bankai). Scoping is load-bearing twice over: npm routes registries
per scope so @uhhm/* resolves against project.uhhm.no while everything
else stays on npmjs, and it means this fork never squats upstream's
names anywhere. The codemod now migrates choo v7 apps to the @uhhm
names. README rewritten with the fork framing and full upstream credit;
the choojs RFC moves to docs/upstream-rfc-draft.md, in the drawer for if
this work ever goes home. API unchanged — choo() is still choo().

Also: Gitea Actions CI + release workflows (npm publish to the uhhm
registry on tag push, CDN bundle uploaded as a generic package),
npm run bundle producing dist-cdn/buuh.js (the whole framework as one
minified ES module for import-map use), docs/publishing.md explaining
what Gitea Packages is (a real npm registry) and is not (a CDN — serve
the bundle from a static host with module-safe MIME instead), and
onload.js constructing window.MutationObserver to match its own guard
(surfaced by smoke-testing the bundle outside a full browser).

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

scripts/size.js

@@ -1,5 +1,5 @@
 // The size budget: what does the framework itself cost on the wire?
-// Bundles @choojs/core + @choojs/html (browser condition) minified via
+// Bundles @uhhm/buuh + @uhhm/buuh-html (browser condition) minified via
 // the same Vite/Rolldown pipeline apps use, then reports min+gzip and
 // min+brotli. CI fails if min+gzip exceeds the budget.
 //
@@ -28,9 +28,9 @@ await build({
     name: 'size-entry',
     resolveId: (id) => id === 'size:entry' ? VIRTUAL : undefined,
     load: (id) => id === VIRTUAL
-      ? "import choo, { Choo, lazy } from '@choojs/core'\n" +
-        "import html from '@choojs/html'\n" +
-        "import raw from '@choojs/html/raw'\n" +
+      ? "import choo, { Choo, lazy } from '@uhhm/buuh'\n" +
+        "import html from '@uhhm/buuh-html'\n" +
+        "import raw from '@uhhm/buuh-html/raw'\n" +
         'window.__keep = { choo, Choo, lazy, html, raw }\n'
       : undefined
   }],
@@ -52,7 +52,7 @@ const br = brotliCompressSync(code, {
 }).length
 
 const kb = (n) => (n / 1024).toFixed(2) + ' kB'
-console.log(`@choojs/core + @choojs/html (browser, minified)`)
+console.log(`@uhhm/buuh + @uhhm/buuh-html (browser, minified)`)
 console.log(`  raw:     ${kb(code.length)}`)
 console.log(`  gzip:    ${kb(gz)}  (budget ${kb(BUDGET_GZIP)})`)
 console.log(`  brotli:  ${kb(br)}`)