Add command to shrink/extend track length (#9)

* Rename sigma merge cmd

* Add mode 2 dist (strava) to GPX info

* Add command to shrink/extend track length

Add and fix a few things (#8)

* Add and fix a few things

* Add and fix a few things

* Update CI

Use --by-dist by default, use dist ratio (#6)

* Use --by-dist by default, use dist ratio

* Fix lint

Add sigma SLF GPX merge (#5)

* Add sigma SLF GPX merge

* Refactor show map

Extend move (#4)

Add cut, rename time to move (#3)

Add route optimization (#2)

Fix lint

Init (#1)