feat(dir-info): add solution for exercise

sh/tests/solutions/dir-info.sh

@@ -0,0 +1,64 @@
+#!/bin/bash
+
+echo "Enter directory path: "
+read dir_path
+
+# Calculate the total size of all the files
+total_size=0
+num_files=0
+for file in $(find $dir_path -type f)
+do
+  file_size=$(stat -c%s "$file")
+  total_size=$((total_size + file_size))
+  num_files=$((num_files + 1))
+done
+
+# Calculate the average size of all the files
+average_size=$((total_size / num_files))
+
+# Find the largest and smallest files
+largest_file=""
+largest_file_size=0
+smallest_file=""
+smallest_file_size=99999999999
+for file in $(find $dir_path -type f)
+do
+  file_size=$(stat -c%s "$file")
+  if [ $file_size -gt $largest_file_size ]
+  then
+    largest_file=$file
+    largest_file_size=$file_size
+  fi
+  if [ $file_size -lt $smallest_file_size ]
+  then
+    smallest_file=$file
+    smallest_file_size=$file_size
+  fi
+done
+
+# Print the results
+echo "Largest file: $largest_file ($largest_file_size bytes)"
+echo "Smallest file: $smallest_file ($smallest_file_size bytes)"
+echo "Average file size: $average_size bytes"
+
+# Print the files larger than average size
+echo "Files larger or equal to average size ($average_size bytes):"
+for file in $(find $dir_path -type f)
+do
+  file_size=$(stat -c%s "$file")
+  if [ $file_size -ge $average_size ]
+  then
+    echo "$file $file_size"
+  fi
+done
+
+# Print the files smaller than average size
+echo "Files smaller than average size ($average_size bytes):"
+for file in $(find $dir_path -type f)
+do
+  file_size=$(stat -c%s "$file")
+  if [ $file_size -lt $average_size ]
+  then
+    echo "$file $file_size"
+  fi
+done