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

node_modules/yaml/dist/stringify/stringifyPair.d.ts

@@ -0,0 +1,3 @@
+import type { Pair } from '../nodes/Pair';
+import type { StringifyContext } from './stringify';
+export declare function stringifyPair({ key, value }: Readonly<Pair>, ctx: StringifyContext, onComment?: () => void, onChompKeep?: () => void): string;