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/package.json

@@ -7,24 +7,23 @@
     "dev": "rollup -c -w"
   },
   "devDependencies": {
-    "@rollup/plugin-commonjs": "^25.0.8",
-    "@rollup/plugin-node-resolve": "^15.3.0",
+    "@rollup/plugin-commonjs": "^28.0.2",
+    "@rollup/plugin-node-resolve": "^16.0.0",
     "@rollup/plugin-terser": "^0.4.4",
     "@timohausmann/quadtree-js": "^1.2.6",
-    "rollup": "^4.27.4",
+    "rollup": "^4.34.1",
     "rollup-plugin-css-only": "^4.5.2",
     "rollup-plugin-svelte": "^7.2.2",
-    "svelte": "^4.2.19"
+    "svelte": "^5.19.6"
   },
   "dependencies": {
-    "@rollup/plugin-replace": "^5.0.7",
-    "@sveltestrap/sveltestrap": "^6.2.7",
+    "@rollup/plugin-replace": "^6.0.2",
+    "@sveltestrap/sveltestrap": "^7.0.3",
     "@urql/svelte": "^4.2.2",
-    "chart.js": "^4.4.6",
-    "date-fns": "^2.30.0",
-    "graphql": "^16.9.0",
-    "mathjs": "^12.4.3",
-    "svelte-chartjs": "^3.1.5",
+    "chart.js": "^4.4.7",
+    "date-fns": "^4.1.0",
+    "graphql": "^16.10.0",
+    "mathjs": "^14.2.0",
     "uplot": "^1.6.31",
     "wonka": "^6.3.4"
   }