routie dev init since i didn't adhere to any proper guidance up until now

frontend/node_modules/eslint-plugin-perfectionist/dist/utils/is-node-on-single-line.js

@@ -0,0 +1,10 @@
+/**
+ * Returns if a node is on a single line.
+ *
+ * @param node - The node to check.
+ * @returns True if the node is on a single line, false otherwise.
+ */
+function isNodeOnSingleLine(node) {
+  return node.loc.start.line === node.loc.end.line
+}
+export { isNodeOnSingleLine }