site: admonitions custom title with icons

site/svelte.config.js

@@ -12,6 +12,10 @@ const config = {
     // If your environment is not supported, or you settled on a specific environment, switch out the adapter.
     // See https://svelte.dev/docs/kit/adapters for more information about adapters.
     adapter: adapter(),
+    prerender: {
+      handleHttpError: "warn",
+      handleMissingId: "warn",
+    },
   },
   extensions: [".svelte"],
 };