chore: add test

packages/svelte/tests/migrate/samples/effects-with-alias-run/input.svelte

@@ -0,0 +1,14 @@
+<script>
+	let count = 0;
+	let run = true;
+	$: console.log(count);
+	$: if (count > 10 && run) {
+		alert('too high')
+	}
+	$: {
+		console.log('foo');
+		if (x) break $;
+		console.log('bar');
+	}
+	$: $count = 1;
+</script>

packages/svelte/tests/migrate/samples/effects-with-alias-run/output.svelte

@@ -0,0 +1,22 @@
+<script>
+	import { run as run_1 } from 'svelte/legacy';
+
+	let count = 0;
+	let run = true;
+	run_1(() => {
+		console.log(count);
+	});
+	run_1(() => {
+		if (count > 10 && run) {
+			alert('too high')
+		}
+	});
+	run_1(() => {
+		console.log('foo');
+		if (x) return;
+		console.log('bar');
+	});
+	run_1(() => {
+		$count = 1;
+	});
+</script>