Initial migration to Svelte5 via full syntax compatability

- updated all dependencies
- removed svelte-chartjs wrapper from dependencies
- sveltestrap causes compilation warnings (once)
- Header.svelte uses new Svelte5 syntax as example
- fixed most initial compilation warnings except circular dependencies with TBD cause

web/frontend/src/config.entrypoint.js

@@ -1,7 +1,8 @@
+import { mount } from 'svelte';
 import {} from './header.entrypoint.js'
 import Config from './Config.root.svelte'
 
-new Config({
+mount(Config, {
     target: document.getElementById('svelte-app'),
     props: {
         isAdmin: isAdmin,