chore: add exports

src/widgets/SampleList/model/index.ts

@@ -0,0 +1,2 @@
+export { layoutManager } from './stores';
+export type { LayoutMode } from './stores';

src/widgets/SampleList/model/stores/index.ts

@@ -0,0 +1,2 @@
+export { layoutManager } from './layoutStore/layoutStore.svelte';
+export type { LayoutMode } from './layoutStore/layoutStore.svelte';