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/html/server.js

@@ -80,7 +80,7 @@ export class HtmlChunks {
     for (const part of this.parts) {
       if (typeof part !== 'string') {
         throw new Error(
-          '@choojs/html: this template has async content and cannot render synchronously — stream it (choo: use toStream() instead of toString())'
+          '@uhhm/buuh-html: this template has async content and cannot render synchronously — stream it (choo: use toStream() instead of toString())'
         )
       }
       out += part
@@ -168,7 +168,7 @@ export default function html (pieces, ...values) {
 
     // tag position: attributes are synchronous, always
     if (isThenable(value) || isAsyncIterable(value)) {
-      throw new Error('@choojs/html: async values are only allowed in child position, not in attributes')
+      throw new Error('@uhhm/buuh-html: async values are only allowed in child position, not in attributes')
     }
 
     // Event handlers are behavior, not markup: `onclick=${fn}` renders