add -l / --last option to amend & start

[Ephigenia]

Right now it’s easy to edit or restart the last created entries note using xargs:

mite list today --limit 1 --tracking true  --columns id --format text | xargs -n1 mite amend --editor

mite list today --limit 1 --tracking true  --columns id --format text | xargs -n1 mite start

But it would be even easier if npm start and npm amend accept a -l / --last option which then uses the last created entry.