feat(blog): add file-based blog with dynamic slugs, MDX content and layout shell

- Introduced blog routing using Next.js App Router
- Implemented dynamic [slug] pages for blog posts
- Added MDX-based content loading via lib/posts
- Integrated shared TopBar layout with navigation
- Established clear content, lib and component separation

apps/public-web/node_modules/enhanced-resolve/lib/AppendPlugin.js

@@ -0,0 +1,49 @@
+/*
+	MIT License http://www.opensource.org/licenses/mit-license.php
+	Author Tobias Koppers @sokra
+*/
+
+"use strict";
+
+/** @typedef {import("./Resolver")} Resolver */
+/** @typedef {import("./Resolver").ResolveRequest} ResolveRequest */
+/** @typedef {import("./Resolver").ResolveStepHook} ResolveStepHook */
+
+module.exports = class AppendPlugin {
+	/**
+	 * @param {string | ResolveStepHook} source source
+	 * @param {string} appending appending
+	 * @param {string | ResolveStepHook} target target
+	 */
+	constructor(source, appending, target) {
+		this.source = source;
+		this.appending = appending;
+		this.target = target;
+	}
+
+	/**
+	 * @param {Resolver} resolver the resolver
+	 * @returns {void}
+	 */
+	apply(resolver) {
+		const target = resolver.ensureHook(this.target);
+		resolver
+			.getHook(this.source)
+			.tapAsync("AppendPlugin", (request, resolveContext, callback) => {
+				/** @type {ResolveRequest} */
+				const obj = {
+					...request,
+					path: request.path + this.appending,
+					relativePath:
+						request.relativePath && request.relativePath + this.appending,
+				};
+				resolver.doResolve(
+					target,
+					obj,
+					this.appending,
+					resolveContext,
+					callback,
+				);
+			});
+	}
+};