* add a time converter, as well as not allowing negative integers
* timedeltaconverter
* styling and unused imports
* update docstrings
* update param name to "duration" instead of seconds
* make timedelta default_unit seconds
* better descriptions & docstrings
* docs for updated paydaytime & slottime
* Fix style
* Few minor fixes
* Cast `total_seconds()` return type to `int`
* Fix one of my own issues
* Make the duration argument catch-rest for convenience
* One more fix for the docs
Co-authored-by: jack1142 <6032823+jack1142@users.noreply.github.com>