feat: upgrade svelte and css compiler (#1288)

Author: DaniAcu

package.json

@@ -85,8 +85,8 @@
     "rollup-plugin-dts": "6.1.1",
     "sass": "1.85.0",
     "strip-json-comments": "5.0.1",
-    "svelte": "3.49.0",
-    "svelte-preprocess": "5.1.4",
+    "svelte": "5.19.9",
+    "svelte-preprocess": "6.0.3",
     "terser": "^5.39.0",
     "ts-essentials": "10.0.4",
     "tsup": "8.3.6",