feat: Add function to count files by extension in current directory

scripts/count_files_by_extension.zsh

@@ -0,0 +1,17 @@
+# Function to count files by extension in the current directory
+count_files_by_extension() {
+    # Check if the current directory is valid
+    if [[ ! -d . ]]; then
+        echo "Error: Current directory is invalid."
+        return 1
+    fi
+
+    # Use find and awk to count files by extension
+    find . -type f | awk -F. '
+    NF>1 { ext[$NF]++ }
+    END {
+        for (e in ext) {
+            printf "%s: %d\n", e, ext[e]
+        }
+    }'
+}