json数据生成

非常感谢开源这么好的框架，在使用过程中发现如果需要将传统的图数据格式转换为Euler可以接受的JSON数据比较麻烦，请问有增加更多数据接口的计划吗，或者转换工具的开发计划。

The issue requests additional data interfaces or a conversion tool for turning traditional graph data into Euler-compatible JSON. No files, tests, or entry points are identified, so first inspect the repository's existing data-ingestion and JSON-handling paths. Done should include an agreed input format, conversion behavior, and verification that Euler accepts the generated JSON.

Written by the indexing model from the issue text.