feat: add markdown content pipeline with build script

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

content/blog/en/2026-03-25-introducing-texpixel.md

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+---
+title: Introducing TexPixel
+description: Meet TexPixel — your AI-powered formula recognition tool
+slug: introducing-texpixel
+date: 2026-03-25
+tags: [announcement, product]
+---
+
+# Introducing TexPixel
+
+We're excited to announce TexPixel, an AI-powered tool for converting math formulas from images into editable formats.
+
+## Why TexPixel?
+
+Converting handwritten or printed math formulas into digital formats has always been a tedious process. TexPixel makes it effortless — just upload an image and get LaTeX, MathML, or Markdown output in seconds.
+
+## Key Features
+
+- **High accuracy** — Powered by advanced AI models
+- **Multiple output formats** — LaTeX, MathML, Markdown, Word
+- **Easy to use** — No installation required, works in your browser
+- **Free to start** — 3 free uploads per day, no credit card needed
+
+## What's Next
+
+We're working on exciting new features including batch processing, API access, and more. Stay tuned!

content/blog/zh/2026-03-25-introducing-texpixel.md

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+---
+title: TexPixel 介绍
+description: 认识 TexPixel — 你的 AI 公式识别工具
+slug: introducing-texpixel
+date: 2026-03-25
+tags: [公告, 产品]
+---
+
+# TexPixel 介绍
+
+我们很高兴推出 TexPixel，一款 AI 驱动的数学公式识别工具，可以将图片中的公式转换为可编辑的格式。
+
+## 为什么选择 TexPixel？
+
+将手写或印刷体数学公式转换为数字格式一直是一个繁琐的过程。TexPixel 让这一切变得轻松 — 只需上传图片，即可在几秒内获得 LaTeX、MathML 或 Markdown 输出。
+
+## 核心功能
+
+- **高精度** — 由先进的 AI 模型驱动
+- **多种输出格式** — LaTeX、MathML、Markdown、Word
+- **易于使用** — 无需安装，浏览器即可使用
+- **免费开始** — 每日 3 次免费上传，无需信用卡
+
+## 接下来
+
+我们正在开发更多令人兴奋的新功能，包括批量处理、API 访问等。敬请期待！