add test

Author: baseballyama

packages/eslint-plugin-svelte/tests/fixtures/rules/prefer-svelte-reactivity/valid/local-variables-input.svelte renamed to packages/eslint-plugin-svelte/tests/fixtures/rules/prefer-svelte-reactivity/valid/local-variables1-input.svelte

@@ -0,0 +1,16 @@
+let toys = $state([]);
+
+export function getUniqueToys() {
+	let names = new Set();
+	let uniqueToys = [];
+	for (const toy in toys) {
+		if (!names.has(toy.name)) {
+			uniqueToys.push(toy);
+		}
+	}
+	return uniqueToys;
+}
+
+let uniqueToys = $derived.by(getUniqueToys);
+
+console.log(uniqueToys)