feat: add json2chart plugin (v1.2.0)

[lfenghx]

Plugin Submission Form

1. Metadata

• Plugin Author: lfenghx
• Plugin Name: json2chart
• Repository URL: https://github.com/lfenghx/json2chart

2. Submission Type

• New plugin submission
• Version update for existing plugin

3. Description

json2chart is an intelligent JSON data visualization tool that can automatically convert JSON format data into various types of interactive charts. The tool adopts LLM intelligent analysis technology to automatically identify data structures and recommend the best visualization solutions.

4. 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

5. 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
• Link to the repository for the plugin source code

6. Privacy Protection Information

Based on Dify Plugin Privacy Protection Guidelines:

Data Collection

My plugin does not collect any user personal data.

Privacy Policy

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