Update 'what's here'

what%27s-here.md

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+## `find-parent PATTERN...`
+
+- finds the nearest containing directory with a file matching one of the patterns
+- so, `find-parent flake.nix`, or `find-parent '*.cabal'` or whatever
+- prints the full path of the file it found by default
+- or just the dir it was in with the `-d` flag
+- exits with 1 otherwise
+- written in [execline](https://skarnet.org/software/execline/index.html), waow
+
+## `wide`, `little`
+
+- makes text look ｌｉｋｅ　ｔｈｉｓ or ˡⁱᵏᵉ ᵗʰⁱˢ
+- the end
+
+## `tablet-setup`
+
+- sets the buttons, orientation, etc of my graphics tablet
+- written in [raku](https://raku.org/) because normal languages are for chumps
+
+## `sbin/i4oled-chgrp`
+
+- `i4oled-chgrp DIR` changes the group any files inside `DIR` to `plugdev`
+- used by `bin/tablet_setup` to make the screen thingies on my tablet writeable
+- a separate script because it needs to run as root