fix(cses): flatten directory

cses/script.bash

@@ -0,0 +1,11 @@
+#!/bin/bash
+
+for dir in */; do
+    dir_name="${dir%/}" # Remove trailing slash
+    
+    for file in "$dir"*.*; do
+        ext="${file##*.}"  # Extract extension
+        mv "$file" "./${dir_name}.$ext"
+    done
+
+done