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/next/dist/shared/lib/app-router-context.shared-runtime.d.ts

@@ -0,0 +1,57 @@
+import type { FocusAndScrollRef, PrefetchKind } from '../../client/components/router-reducer/router-reducer-types';
+import type { Params } from '../../server/request/params';
+import type { FlightRouterState, FlightSegmentPath, CacheNode } from './app-router-types';
+import React from 'react';
+export interface NavigateOptions {
+    scroll?: boolean;
+}
+export interface PrefetchOptions {
+    kind: PrefetchKind;
+    onInvalidate?: () => void;
+}
+export interface AppRouterInstance {
+    /**
+     * Navigate to the previous history entry.
+     */
+    back(): void;
+    /**
+     * Navigate to the next history entry.
+     */
+    forward(): void;
+    /**
+     * Refresh the current page.
+     */
+    refresh(): void;
+    /**
+     * Navigate to the provided href.
+     * Pushes a new history entry.
+     */
+    push(href: string, options?: NavigateOptions): void;
+    /**
+     * Navigate to the provided href.
+     * Replaces the current history entry.
+     */
+    replace(href: string, options?: NavigateOptions): void;
+    /**
+     * Prefetch the provided href.
+     */
+    prefetch(href: string, options?: PrefetchOptions): void;
+}
+export declare const AppRouterContext: React.Context<AppRouterInstance | null>;
+export declare const LayoutRouterContext: React.Context<{
+    parentTree: FlightRouterState;
+    parentCacheNode: CacheNode;
+    parentSegmentPath: FlightSegmentPath | null;
+    parentParams: Params;
+    debugNameContext: string;
+    url: string;
+    isActive: boolean;
+} | null>;
+export declare const GlobalLayoutRouterContext: React.Context<{
+    tree: FlightRouterState;
+    focusAndScrollRef: FocusAndScrollRef;
+    nextUrl: string | null;
+    previousNextUrl: string | null;
+}>;
+export declare const TemplateContext: React.Context<React.ReactNode>;
+export declare const MissingSlotContext: React.Context<Set<string>>;