添加 ObjectDocs 启动模板，包括 README、配置文件和示例文档

Author: hotlong

examples/starter/.gitignore

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+node_modules
+.next
+out
+.env
+.DS_Store

examples/starter/README.md

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+# ObjectDocs Starter Template
+
+This is a starter template for creating documentation sites with [ObjectDocs](https://github.com/steedos/objectdocs). It comes pre-configured with the necessary directory structure and dependencies to get you started quickly.
+
+## Features
+
+- **Configuration as Code**: Manage site navigation and settings via JSON.
+- **MDX Support**: Write content using Markdown mixed with React components.
+- **Live Preview**: Fast development server with hot reload.
+- **Production Ready**: Optimized static build output.
+
+## Getting Started
+
+### 1. Installation
+
+Install the dependencies:
+
+```bash
+pnpm install
+```
+
+### 2. Development
+
+Start the development server:
+
+```bash
+pnpm docs:dev
+```
+
+Open [http://localhost:7777](http://localhost:7777) in your browser to see the result.
+
+### 3. Building
+
+Build the static site for production:
+
+```bash
+pnpm docs:build
+```
+
+The output will be in the `.next` or configured output directory.
+
+## Project Structure
+
+```bash
+.
+├── content/
+│   ├── docs.site.json      # Global site configuration (branding, nav links)
+│   └── docs/               # Documentation content root
+│       ├── index.mdx       # Homepage
+│       ├── guide.mdx       # Example page
+│       └── meta.json       # Sidebar navigation order
+├── package.json
+└── README.md
+```
+
+## Customization
+
+- **Site Name & Logo**: Edit `content/docs.site.json`.
+- **Navigation Sidebar**: Edit `content/docs/meta.json` or creating new `meta.json` files in subdirectories.
+- **Adding Pages**: Create new `.mdx` files in `content/docs/` and add them to the relevant `meta.json`.
+
+## License
+
+MIT

examples/starter/content/docs.site.json

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+{
+  "branding": {
+    "name": "ObjectDocs Starter"
+  },
+  "links": [
+    {
+      "text": "Home",
+      "url": "/"
+    },
+    {
+      "text": "GitHub",
+      "url": "https://github.com",
+      "icon": "github"
+    }
+  ]
+}

examples/starter/content/docs/guide.mdx

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+---
+title: User Guide
+description: Detailed guide for users
+---
+
+# User Guide
+
+This is a sample guide page.
+
+## Features
+
+- **MDX Support**: Write content using Markdown and React components.
+- **Fast Refresh**: Instant feedback during development.
+- **Built on Next.js**: Leveraging the power of React Server Components.
+
+## Next Steps
+
+Try creating a new file in `content/docs/` folder.

examples/starter/content/docs/index.mdx

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+---
+title: Welcome
+description: Your new ObjectDocs site
+---
+
+# Welcome to ObjectDocs
+
+This is a starter template for your documentation site.
+
+## Getting Started
+
+Edit this file in `content/docs/index.mdx` to see changes.
+
+<Cards>
+  <Card title="Read the Guide" href="/docs/guide" description="Learn how to use ObjectDocs" />
+  <Card title="Configuration" href="/docs/config" description="Customize your site" />
+</Cards>

examples/starter/content/docs/meta.json

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+{
+  "title": "Documentation",
+  "pages": [
+    "index",
+    "guide"
+  ]
+}

examples/starter/package.json

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+{
+  "name": "objectdocs-starter",
+  "version": "0.1.0",
+  "private": true,
+  "scripts": {
+    "docs:dev": "objectdocs dev",
+    "docs:build": "objectdocs build",
+    "docs:start": "objectdocs start"
+  },
+  "devDependencies": {
+    "@objectdocs/cli": "workspace:*"
+  }
+}