Refactor routing in App component to enhance navigation and improve error handling by integrating dynamic routes and updating the NotFound route.

node_modules/astro/dist/vite-plugin-html/transform/slots.d.ts

@@ -0,0 +1,8 @@
+import type { Root } from 'hast';
+import type { Plugin } from 'unified';
+import type MagicString from 'magic-string';
+declare const rehypeSlots: Plugin<[{
+    s: MagicString;
+}], Root>;
+export default rehypeSlots;
+export declare const SLOT_PREFIX = "___SLOTS___";