Feat/add markitdown plugin

[Yevanchen]

Plugin Submission Form

1. Submission Type

• New plugin submission
• Version update for existing plugin

2. Description

MarkItDown is a powerful document conversion plugin that transforms various file formats into Markdown. It supports a wide range of formats including PDF, Word, PowerPoint, Excel, HTML, images (with OCR), audio (with transcription), and more. The plugin features batch processing capabilities and clear content separation, making it an excellent alternative to traditional document extraction methods.

3. Checklist

• I have read and followed the Publish to Dify Marketplace guidelines
• I have read and comply with the Plugin Developer Agreement
• I confirm my plugin works properly on both Dify Community Edition and Cloud Version
• I confirm my plugin has been thoroughly tested for completeness and functionality
• My plugin brings new value to Dify

4. Documentation Checklist

Please confirm that your plugin README includes all necessary information:

• Step-by-step setup instructions
• Detailed usage instructions
• All required APIs and credentials are clearly listed
• Connection requirements and configuration details

5. Privacy Protection Information

Based on Dify Plugin Privacy Protection Guidelines:

Data Collection

The plugin processes the following types of data during document conversion:

• File content (temporary, deleted after processing)
• File metadata (filename, size, type)
• No personal data is collected or stored permanently
• All processing is done locally with no external data transmission

Privacy Policy

• I confirm that I have prepared and included a privacy policy in my plugin package based on the Plugin Privacy Protection Guidelines

Additional Information

• The plugin is based on MarkItDown 0.0.2a1
• All file processing is done locally
• Temporary files are automatically cleaned up after processing
• Network connectivity is only required for certain conversion operations (OCR, speech transcription)
• The plugin follows best practices for data handling and security