refactor: rebrand as markdoc-nextjs-localization-example

Strip Cal.com references from the demo content and rebrand the repo as
a generic example showing how to localize a Next.js App Router site
authored in Markdoc with Lingo.dev.

- Replace Cal.com brand/copy in navbar, hero, sidebar, home, blog
- Replace calcom-v6-4 changelog with hello-markdoc walkthrough post
- Prune unused ui.json nav/CTA keys; remove stub href="#" links
- Swap Cal Sans font for Space Grotesk
- Rewrite README to match ios/android example structure
- Add .github/workflows/translate.yml for Lingo.dev CI

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Author: maxprilutskiy

.github/workflows/translate.yml

@@ -0,0 +1,15 @@
+name: Translate
+on:
+  push:
+    branches: [main]
+permissions:
+  contents: write
+jobs:
+  translate:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - name: Lingo.dev
+        uses: lingodotdev/lingo.dev@main
+        with:
+          api-key: ${{ secrets.LINGODOTDEV_API_KEY }}

AGENTS.md

@@ -1,5 +1,5 @@
 <!-- BEGIN:nextjs-agent-rules -->
 # This is NOT the Next.js you know
 
-This version has breaking changes — APIs, conventions, and file structure may all differ from your training data. Read the relevant guide in `node_modules/next/dist/docs/` before writing any code. Heed deprecation notices.
+This version has breaking changes – APIs, conventions, and file structure may all differ from your training data. Read the relevant guide in `node_modules/next/dist/docs/` before writing any code. Heed deprecation notices.
 <!-- END:nextjs-agent-rules -->

README.md

@@ -1,36 +1,55 @@
-This is a [Next.js](https://nextjs.org) project bootstrapped with [`create-next-app`](https://nextjs.org/docs/app/api-reference/cli/create-next-app).
+# Next.js Markdoc Localization Example
 
-## Getting Started
+Demonstrates automated localization for a Next.js App Router site that authors long-form content in [Markdoc](https://markdoc.dev) and UI strings in JSON, using [Lingo.dev](https://lingo.dev) CLI and GitHub Actions.
 
-First, run the development server:
+> **Full walkthrough:** [lingo.dev/en/guides/markdoc-nextjs-localization](https://lingo.dev/en/guides/markdoc-nextjs-localization)
 
-```bash
-npm run dev
-# or
-yarn dev
-# or
-pnpm dev
-# or
-bun dev
-```
+## What's inside
+
+- `src/app/[lang]/` – Next.js App Router, locale-scoped routes
+- `src/content/en/pages/*.md`, `src/content/en/blog/*.md` – source Markdoc content (English)
+- `src/content/en/ui.json` – source UI-string catalog
+- `src/markdoc.schema.ts` – custom Markdoc tag schema wired to React components
+- `src/proxy.ts` – middleware that redirects bare paths to the visitor's best-matching locale
+- `i18n.json` – Lingo.dev CLI configuration (two buckets: `markdoc`, `json`)
+- `.github/workflows/translate.yml` – GitHub Actions workflow
 
-Open [http://localhost:3000](http://localhost:3000) with your browser to see the result.
+## Quick start
 
-You can start editing the page by modifying `app/page.tsx`. The page auto-updates as you edit the file.
+1. Fork this repo
+2. Add `LINGODOTDEV_API_KEY` to **Settings > Secrets and variables > Actions**
+3. Push a change to any file under `src/content/en/`
+4. Translations appear automatically via commit to main
 
-This project uses [`next/font`](https://nextjs.org/docs/app/building-your-application/optimizing/fonts) to automatically optimize and load [Geist](https://vercel.com/font), a new font family for Vercel.
+## How it works
 
-## Learn More
+The Lingo.dev CLI reads the source Markdoc files and `ui.json`, identifies new or changed entries using a lockfile, translates the delta through a configured localization engine, and writes per-locale files into `src/content/[locale]/`. Frontmatter, Markdoc custom tags, and JSON shape are preserved – only translatable text changes. The GitHub Actions workflow runs this on every push to main.
 
-To learn more about Next.js, take a look at the following resources:
+Next.js routes under `src/app/[lang]/` load the matching locale's files at request time. A middleware inspects the `Accept-Language` header and redirects bare paths like `/` or `/blog/hello-markdoc` to the best-matching locale.
 
-- [Next.js Documentation](https://nextjs.org/docs) - learn about Next.js features and API.
-- [Learn Next.js](https://nextjs.org/learn) - an interactive Next.js tutorial.
+## Locales
 
-You can check out [the Next.js GitHub repository](https://github.com/vercel/next.js) - your feedback and contributions are welcome!
+- **Source:** `en`
+- **Targets:** `es`, `fr`, `de`
 
-## Deploy on Vercel
+## Running locally
+
+```bash
+pnpm install
+pnpm dev
+```
+
+Open `http://localhost:3000` – you'll be redirected to `/en`, `/es`, `/fr`, or `/de` based on your browser's `Accept-Language`.
+
+To translate locally:
+
+```bash
+pnpm lingo
+```
 
-The easiest way to deploy your Next.js app is to use the [Vercel Platform](https://vercel.com/new?utm_medium=default-template&filter=next.js&utm_source=create-next-app&utm_campaign=create-next-app-readme) from the creators of Next.js.
+## Links
 
-Check out our [Next.js deployment documentation](https://nextjs.org/docs/app/building-your-application/deploying) for more details.
+- [Guide: Next.js App Router Localization with Markdoc](https://lingo.dev/en/guides/markdoc-nextjs-localization)
+- [Lingo.dev CLI docs](https://lingo.dev/en/docs/cli)
+- [GitHub Actions integration](https://lingo.dev/en/docs/integrations/github)
+- [Create a free account](https://lingo.dev)