give each app its own page, preloading and session stores, using context

runtime/internal/shared.mjs

@@ -1,10 +1,5 @@
 import { writable } from 'svelte/store';
 
-export const stores = {
-	preloading: writable(false),
-	page: writable(null)
-};
-
 export const CONTEXT_KEY = {};
 
 export const preload = () => ({});