development

- Modified `split-panel.mjs` to enhance user experience on touch devices.
- Removed the "touchstart" event from the initial event type array, and added a dedicated touch event listener for handling drag movements.
- Implemented touch-specific logic for resizing panels, mirroring existing mouse drag functionality.
- Introduced proper touch event handling for starting, moving, and ending the drag operation, ensuring smooth interaction.

These changes were made to address the lack of touch support, enabling users on mobile devices to interact with the split-panel effectively.