feat(web): import oh-my-openagent-web Next.js + Cloudflare Workers site

Imports the public marketing site previously living in
../oh-my-opencode-web. Independent of the npm plugin: own package.json,
bun.lock, tsconfig.json. Not included in the published package — root
files: array still only ships dist/, bin/, postinstall.mjs.

Stack:
- Next.js 15.5 App Router + RSC, deployed to Cloudflare Workers via
  @opennextjs/cloudflare (build target .open-next/worker.js).
- Tailwind v4 + shadcn/ui primitives.
- next-intl with 4 locales (en/ja/ko/zh) under app/[locale]/.
- Playwright e2e tests under web/e2e/.
- Custom domains ohmyopenagent.com (primary) and ohmyopencode.org
  (legacy alias) declared in web/wrangler.toml.

Source files were re-formatted via `bun run format` to bring them in
line with the existing .prettierrc (singleQuote: false). Functional code
unchanged.

web/app/[locale]/layout.tsx

@@ -0,0 +1,34 @@
+import type { Metadata } from "next"
+import type { JSX } from "react"
+import { notFound } from "next/navigation"
+import { hasLocale } from "next-intl"
+import { setRequestLocale } from "next-intl/server"
+import { LocalizedPageShell } from "@/app/_components/localized-page-shell"
+import { routing } from "@/i18n/routing"
+
+export const metadata: Metadata = {
+  description:
+    "Meet Sisyphus: The batteries-included agent that codes like you. Multi-model orchestration, background agents, 40+ lifecycle hooks.",
+}
+
+export function generateStaticParams() {
+  return routing.locales.map((locale) => ({ locale }))
+}
+
+export default async function LocaleLayout({
+  children,
+  params,
+}: {
+  children: React.ReactNode
+  params: Promise<{ locale: string }>
+}): Promise<JSX.Element> {
+  const { locale } = await params
+
+  if (!hasLocale(routing.locales, locale)) {
+    notFound()
+  }
+
+  setRequestLocale(locale)
+
+  return <LocalizedPageShell locale={locale}>{children}</LocalizedPageShell>
+}