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

node_modules/regex/dist/esm/utils-internals.d.ts

@@ -0,0 +1,9 @@
+export const noncapturingDelim: any;
+/**
+@param {string} str
+@param {number} pos
+@param {string} oldValue
+@param {string} newValue
+@returns {string}
+*/
+export function spliceStr(str: string, pos: number, oldValue: string, newValue: string): string;