Refactor pre-commit hooks to use prek (#976)

* ci: change to prek for pre-commit

* refactor: fix shellcheck warnings for the scripts

* chore: unify whitespace formatting

* nix: add prek to dev shell

quickshell/assets/sounds/wavconvert.sh

@@ -9,7 +9,7 @@ for file in *.oga; do
     fi
 done
 
-# Convert plasma sounds  
+# Convert plasma sounds
 cd ../plasma
 for file in *.ogg; do
     if [ -f "$file" ]; then