*Features*
- allow to import gpx
- allow grouping items/routes (not finished yet).
- adding support for grouping items (each item can be set a group). Also added support for exporting/importing items

*Bug fixes*
- themes update
- better address formatting
- use scrollview for action buttons in case there are too many
- svelte 4 fixes
- elevation chart dont show time info if there is none
- allow route surface computation on longer routes
- a lot of fixes for the search component