[FEATURE] SplitRecursively returns line/column numbers of start/end character for each chunk

[badmonster0]

This is a user feature request from Discord:

For cocoindex.functions.SplitRecursively(), is it possible to support returning start line number and end line number for each chunk so I can store that information to the database? It would be useful for me to reference certain the code chunk in Github.
(location is not that useful for such use case)

We want to update SplitRecursively to add line/column numbers of start/end character for each chunk

---

❤️ Contributors, please refer to 📙Contributing Guide.
Unless the PR can be sent immediately (e.g. just a few lines of code), we recommend you to leave a comment on the issue like I'm working on it or Can I work on this issue? to avoid duplicating work. Our Discord server is always open and friendly.