feat: better demo site (#1241)

* demo: add image-gallery post

* demo: change language weight

* demo: add multilanguage about page

* demo: change title and url

* demo: add shortcode documentation with multi-language support

* demo: improve markdown guide post

* demo: improve Math Typesetting post

* demo: rename Markdown Syntax Guide post

* demo: remove emoji support post

* demo: remove placeholder text post

* demo: remove rich-content post

* demo: rename image gallery page bundle

* demo: add multilingual `Documentation` category

* demo: Increase pagination pager size from 3 to 5.

* demo: add multilingual links, search, and archives pages

* demo: remove `ar` from demosite

demo/content/page/about/index.md

@@ -1,13 +1,8 @@
 ---
 title: About
-description: Hugo, the world's fastest framework for building websites
-date: '2019-02-28'
-aliases:
-  - about-us
-  - about-hugo
-  - contact
-license: CC BY-NC-ND
-lastmod: '2020-10-09'
+description: Everything you need to know about this site and its author.
+date: 2026-01-26
+lastmod: 2026-01-26
 menu:
     main: 
         weight: -90
@@ -15,20 +10,37 @@ menu:
             icon: user
 ---
 
-Written in Go, Hugo is an open source static site generator available under the [Apache License 2.0.](https://github.com/gohugoio/hugo/blob/master/LICENSE) Hugo supports TOML, YAML and JSON data file types, Markdown and HTML content files and uses shortcodes to add rich content. Other notable features are taxonomies, multilingual mode, image processing, custom output formats, HTML/CSS/JS minification and support for Sass SCSS workflows.
+## Who is this for?
 
-Hugo makes use of a variety of open source projects including:
+This is a sample **About** page. You can use it to introduce yourself, your blog, or your project. 
 
-* https://github.com/yuin/goldmark
-* https://github.com/alecthomas/chroma
-* https://github.com/muesli/smartcrop
-* https://github.com/spf13/cobra
-* https://github.com/spf13/viper
+## About the Author
 
-Hugo is ideal for blogs, corporate websites, creative portfolios, online magazines, single page applications or even a website with thousands of pages.
+Hello! I'm a passionate blogger and open-source enthusiast. I love exploring new technologies and sharing my experiences with the community.
 
-Hugo is for people who want to hand code their own website without worrying about setting up complicated runtimes, dependencies and databases.
+### My Journey
 
-Websites built with Hugo are extremely fast, secure and can be deployed anywhere including, AWS, GitHub Pages, Heroku, Netlify and any other hosting provider.
+I started my journey in web development over 10 years ago. Since then, I've worked on numerous projects ranging from small personal blogs to large-scale enterprise applications.
+
+### Skills
+
+- **Front-end**: HTML, CSS, JavaScript, React, Vue
+- **Back-end**: Node.js, Python, Go
+- **Tools**: Git, Docker, Hugo, Neovim
+
+## Contact Me
+
+Feel free to reach out if you have any questions or just want to say hi!
+
+- **Email**: [hello@example.com](mailto:hello@example.com)
+- **Twitter**: [@example](https://twitter.com/example)
+- **GitHub**: [example](https://github.com/example)
+
+---
+
+> "Logic will get you from A to B. Imagination will take you everywhere."  
+> — *Albert Einstein*
+
+---
+*This page was generated by AI.*
 
-Learn more and contribute on [GitHub](https://github.com/gohugoio).