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/jsx/rehype.d.ts

@@ -0,0 +1,5 @@
+import type { RehypePlugin } from '@astrojs/markdown-remark';
+import type { VFile } from 'vfile';
+import type { PluginMetadata } from '../vite-plugin-astro/types.js';
+export declare const rehypeAnalyzeAstroMetadata: RehypePlugin;
+export declare function getAstroMetadata(file: VFile): PluginMetadata["astro"] | undefined;