[fix] pass form prop to pages

Fixes #6610
Was not passed to pages in all situations

Author: dummdidumm

.changeset/nine-sheep-grab.md

@@ -0,0 +1,5 @@
+---
+'@sveltejs/kit': patch
+---
+
+[fix] pass `form` prop to pages

packages/kit/src/core/sync/write_root.js

@@ -21,7 +21,7 @@ export function write_root(manifest_data, output) {
 
 	let l = max_depth;
 
-	let pyramid = `<svelte:component this={components[${l}]} data={data_${l}} />`;
+	let pyramid = `<svelte:component this={components[${l}]} data={data_${l}} {form} />`;
 
 	while (l--) {
 		pyramid = `