[v2-svelte] noticeable delay when loading pages

[matcool]

could be caused by the fact that we're using fetch on .server.ts, but i see no other way of keeping it server side rendered

[matcool]

hm https://stackoverflow.com/questions/68160941/sveltekit-how-to-correctly-show-a-loading-indicator-in-a-server-rendered-page-o