feat: add markdown content pipeline with build script

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

content/docs/en/getting-started.md

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+---
+title: Getting Started
+description: Learn how to use TexPixel for formula recognition
+slug: getting-started
+date: 2026-03-25
+tags: [tutorial, beginner]
+order: 1
+---
+
+# Getting Started with TexPixel
+
+TexPixel is an AI-powered math formula recognition tool that converts handwritten or printed formulas into LaTeX, MathML, and Markdown.
+
+## Quick Start
+
+1. **Upload** — Drag and drop an image or PDF containing math formulas
+2. **Wait** — Our AI will process and recognize the formulas
+3. **Export** — Copy the result or export in your preferred format
+
+## Supported Formats
+
+### Input
+- Images: JPG, PNG
+- Documents: PDF
+
+### Output
+- LaTeX
+- MathML
+- Markdown
+- Word (DOCX)
+- Image
+
+## Example
+
+Upload an image containing the quadratic formula, and TexPixel will output:
+
+$$x = \frac{-b \pm \sqrt{b^2 - 4ac}}{2a}$$
+
+## Tips
+
+- For best results, ensure your formula images are clear and well-lit
+- Handwritten formulas work best when written with dark ink on white paper
+- PDF files can contain multiple pages — all formulas will be extracted

content/docs/zh/getting-started.md

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+---
+title: 快速开始
+description: 了解如何使用 TexPixel 进行公式识别
+slug: getting-started
+date: 2026-03-25
+tags: [教程, 入门]
+order: 1
+---
+
+# TexPixel 快速开始
+
+TexPixel 是一款 AI 驱动的数学公式识别工具，可以将手写或印刷体公式转换为 LaTeX、MathML 和 Markdown。
+
+## 快速上手
+
+1. **上传** — 拖拽包含数学公式的图片或 PDF
+2. **等待** — AI 将自动处理并识别公式
+3. **导出** — 复制结果或以你喜欢的格式导出
+
+## 支持的格式
+
+### 输入格式
+- 图片：JPG、PNG
+- 文档：PDF
+
+### 输出格式
+- LaTeX
+- MathML
+- Markdown
+- Word (DOCX)
+- 图片
+
+## 示例
+
+上传一张包含二次公式的图片，TexPixel 将输出：
+
+$$x = \frac{-b \pm \sqrt{b^2 - 4ac}}{2a}$$
+
+## 提示
+
+- 为获得最佳效果，请确保公式图片清晰、光线充足
+- 手写公式在白纸上用深色墨水书写效果最佳
+- PDF 文件可以包含多页，所有公式都会被提取