[Feature] allow 1/64th notes to be used for lasers

[Nerdy-boi]

Is your feature request related to a problem? Please describe. USC fails to handle continuous lasers that aren't spaced 1/24th apart. This is frustrating for people that use alternative ways to get charts

Describe the solution you'd like A small extension to the ksh format that can differentiate between 1/24th and 1/64th continuous lasers.

As well as the relevant changes to the parsing code in USC to handle such changes

Describe alternatives you've considered Tried to map 1/64th notes into 1/24th laser within my python script. But charts would need to be manually fixed in the editor.

Additional context

[Drewol]

USC simply follows what is specified in https://github.com/m4saka/ksh/blob/master/ksh_format.md for the laser interpretation.

1/32th or shorter laser notes are recognized as laser slams. (There's no way to create 1/32th ordinary laser notes in the current specification.)