Add CLI argument check in shebang-patcher

scripts/.local/share/scripts/shebang-patcher

@@ -1,3 +1,12 @@
 #!/bin/sh
 
+usage() {
+    echo "Usage: shebang-patcher <script>"
+    exit 1
+}
+
+if [ $# != 1 ]; then
+    usage
+fi
+
 sed "s/#!\/bin\/bash/#!\/usr\/bin\/env bash/" -i "$1"