chore(template): clean-slate template snapshot from bb4a0c7

Curated, product-agnostic snapshot of the post-story-04 tree: demo
content deleted, auth-only reference feature, web-next shell, all gates
green. Product-specific docs, ADRs 027-029, PRDs/epics/archive, editor
library traces, and product naming are curated out; generic template
repairs (coverage provider devDeps, root test:coverage script, live
lint fixes, root-only release-please) are kept. See TEMPLATE.md for
provenance, curation list, and usage.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_016j8z4VHjedXDTjEDNg7qHK

turbo/generators/templates/core-ui-component/component.tsx.hbs

@@ -0,0 +1,11 @@
+import { forwardRef, type HTMLAttributes } from "react";
+import { cn } from "../../lib/utils";
+
+export interface {{pascalCase name}}Props extends HTMLAttributes<HTMLDivElement> {}
+
+export const {{pascalCase name}} = forwardRef<HTMLDivElement, {{pascalCase name}}Props>(
+  ({ className, ...props }, ref) => (
+    <div ref={ref} className={cn("", className)} {...props} />
+  ),
+);
+{{pascalCase name}}.displayName = "{{pascalCase name}}";