little tool for tournament cross-tables

bugfix: handle a missing save dir

Scenario:

  • run a whole new app (no save dir yet) as a .love file
  • open the driver, make an edit

Before this commit, I was seeing errors due to the save dir not existing. Let's depend on love.filesystem as needed. Another "good seam" IMO (https://lobste.rs/s/idi1wt/open_source_vs_ux).

Created by  akkartik  on November 17, 2023
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