refactor: move helper scripts into .bin folder and update tasks.json

.bin/clean_dangling_images.sh

@@ -0,0 +1,12 @@
+#!/bin/bash
+
+# Get list of image IDs with <none> tag (dangling images)
+dangling_images=$(podman images -f "dangling=true" -q)
+
+if [ -z "$dangling_images" ]; then
+  echo "✅ No dangling images to remove."
+else
+  echo "⚠️ Removing dangling images..."
+  echo "$dangling_images" | xargs podman rmi -f
+  echo "🧹 Done!"
+fi