feat: add mcp-servers/**

mcp-servers/markitdown/.env.example

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+# MCP Markitdown Server Configuration
+# ==================================
+
+# MCP Service
+MCP_MARKITDOWN_VERSION=latest
+MCP_MARKITDOWN_PORT_OVERRIDE=8000
+
+# Data directory
+DATA_DIR=./data
+
+# Timezone
+TZ=UTC

mcp-servers/markitdown/README.md

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+# Markitdown MCP Server
+
+Microsoft's Markitdown MCP Server provides lightweight conversion functionality to Markdown format through the Model Context Protocol.
+
+## Features
+
+- 📄 **Document Conversion** - Convert documents to markdown
+- 🔗 **URL Conversion** - Convert web content to markdown
+- 📝 **Content Processing** - Process and extract content
+
+## Environment Variables
+
+| Variable                       | Default  | Description                  |
+| ------------------------------ | -------- | ---------------------------- |
+| `MCP_MARKITDOWN_VERSION`       | `latest` | MCP Markitdown image version |
+| `MCP_MARKITDOWN_PORT_OVERRIDE` | `8000`   | MCP service port             |
+| `DATA_DIR`                     | `./data` | Data directory path          |
+| `TZ`                           | `UTC`    | Timezone                     |
+
+## Quick Start
+
+```bash
+docker compose up -d
+```

mcp-servers/markitdown/README.zh.md

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+# Markitdown MCP 服务器
+
+微软的 Markitdown MCP 服务器通过 Model Context Protocol 提供轻量级的 Markdown 格式转换功能。
+
+## 功能特性
+
+- 📄 **文档转换** - 将文档转换为 Markdown
+- 🔗 **URL 转换** - 将网页内容转换为 Markdown
+- 📝 **内容处理** - 处理和提取内容
+
+## 环境变量
+
+| 变量                           | 默认值   | 说明                    |
+| ------------------------------ | -------- | ----------------------- |
+| `MCP_MARKITDOWN_VERSION`       | `latest` | MCP Markitdown 镜像版本 |
+| `MCP_MARKITDOWN_PORT_OVERRIDE` | `8000`   | MCP 服务端口            |
+| `DATA_DIR`                     | `./data` | 数据目录路径            |
+| `TZ`                           | `UTC`    | 时区                    |
+
+## 快速开始
+
+```bash
+docker compose up -d
+```

mcp-servers/markitdown/docker-compose.yaml

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+x-default: &default
+  restart: unless-stopped
+  logging:
+    driver: json-file
+    options:
+      max-size: 100m
+      max-file: "3"
+
+services:
+  mcp-markitdown:
+    <<: *default
+    image: mcp/markitdown:${MCP_MARKITDOWN_VERSION:-latest}
+    environment:
+      - MCP_HOST=0.0.0.0
+      - TZ=${TZ:-UTC}
+    ports:
+      - "${MCP_MARKITDOWN_PORT_OVERRIDE:-8000}:8000"
+    volumes:
+      - ${DATA_DIR:-./data}:/data
+    healthcheck:
+      test: ["CMD", "wget", "--spider", "-q", "http://localhost:8000/health"]
+      interval: 30s
+      timeout: 10s
+      retries: 3
+      start_period: 10s
+    deploy:
+      resources:
+        limits:
+          cpus: '1.00'
+          memory: 512M
+        reservations:
+          cpus: '0.25'
+          memory: 128M