Splitting gpx files into groups of 25 (strava upload limit?)

Thanks, this was immensely useful.

One thing that I faced was that you can only upload 25 files at a time via the file dialog. Not a big deal to split them myself, but it would be great if the tool did this for me.


<img width="884" height="407" alt="Image" src="https://github.com/user-attachments/assets/04076ed2-4a8b-44cc-a344-16c05bc777dc" />


