examples: improve clean script

Remove mala_vis dir. Remove code duplication. Recursively find dirs and
go clean up there.

Author: elcorto

examples/clean.sh

@@ -1,36 +1,26 @@
 #!/bin/sh
 
+set -u
+
 # Remove artifact files that some example scripts write.
 
-cd basic
-rm -rvf \
-    *.pth \
-    *.pkl \
-    *.db \
-    *.pw* \
-    __pycache__ \
-    *.cube \
-    ex10_vis \
-    *.tmp \
-    *.npy \
-    *.json \
-    *.zip \
-    Be_snapshot* \
-    lammps*.tmp
-cd ..
-cd advanced
-rm -rvf \
-    *.pth \
-    *.pkl \
-    *.db \
-    *.pw* \
-    __pycache__ \
-    *.cube \
-    ex10_vis \
-    *.tmp \
-    *.npy \
-    *.json \
-    *.zip \
-    Be_snapshot* \
-    lammps*.tmp
-cd ..
+here=$(dirname $(readlink -f $0))
+for dir in $here $(find $here -mindepth 1 -type d | grep -vE '\.ruff_cache|__pycache__'); do
+    cd $dir
+    echo "cleaning: $(pwd)"
+    rm -rvf \
+        *.pth \
+        *.pkl \
+        *.pk \
+        *.db \
+        *.pw* \
+        *.cube \
+        ex10_vis \
+        *.tmp \
+        *.npy \
+        *.json \
+        *.zip \
+        Be_snapshot* \
+        lammps*.tmp \
+        mala_vis
+done