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

packages/core/test/hydration-integration.test.js

@@ -12,15 +12,15 @@ let choo, browserHtml, serverString
 before(async () => {
   // Server side first, before any window exists — exactly like production,
   // and toString() enforces it.
-  ;({ default: choo } = await import('@choojs/core'))
-  const { default: serverHtml } = await import('@choojs/html/server')
+  ;({ default: choo } = await import('@uhhm/buuh'))
+  const { default: serverHtml } = await import('@uhhm/buuh-html/server')
   serverString = makeApp(serverHtml).toString('/')
 
   const win = new Window({ url: 'http://localhost/' })
   globalThis.window = win
   globalThis.document = win.document
   globalThis.requestAnimationFrame = win.requestAnimationFrame.bind(win)
-  ;({ default: browserHtml } = await import('@choojs/html/browser'))
+  ;({ default: browserHtml } = await import('@uhhm/buuh-html/browser'))
 })
 
 const tick = (ms = 30) => new Promise((resolve) => setTimeout(resolve, ms))