show count of users and admin on admin page

src/lib/stores.ts

@@ -1,4 +1,7 @@
 import { persisted } from 'svelte-local-storage-store';
 import type { Writable } from 'svelte/store';
+import { writable } from 'svelte/store';
 
 export const playAudio: Writable<boolean> = persisted('playAudio', false);
+
+export const adminCount: Writable<number> = writable(0);