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/server/base-http/helpers.d.ts

@@ -0,0 +1,37 @@
+import type { BaseNextRequest, BaseNextResponse } from './';
+import type { NodeNextRequest, NodeNextResponse } from './node';
+import type { WebNextRequest, WebNextResponse } from './web';
+/**
+ * This file provides some helpers that should be used in conjunction with
+ * explicit environment checks. When combined with the environment checks, it
+ * will ensure that the correct typings are used as well as enable code
+ * elimination.
+ */
+/**
+ * Type guard to determine if a request is a WebNextRequest. This does not
+ * actually check the type of the request, but rather the runtime environment.
+ * It's expected that when the runtime environment is the edge runtime, that any
+ * base request is a WebNextRequest.
+ */
+export declare const isWebNextRequest: (req: BaseNextRequest) => req is WebNextRequest;
+/**
+ * Type guard to determine if a response is a WebNextResponse. This does not
+ * actually check the type of the response, but rather the runtime environment.
+ * It's expected that when the runtime environment is the edge runtime, that any
+ * base response is a WebNextResponse.
+ */
+export declare const isWebNextResponse: (res: BaseNextResponse) => res is WebNextResponse;
+/**
+ * Type guard to determine if a request is a NodeNextRequest. This does not
+ * actually check the type of the request, but rather the runtime environment.
+ * It's expected that when the runtime environment is the node runtime, that any
+ * base request is a NodeNextRequest.
+ */
+export declare const isNodeNextRequest: (req: BaseNextRequest) => req is NodeNextRequest;
+/**
+ * Type guard to determine if a response is a NodeNextResponse. This does not
+ * actually check the type of the response, but rather the runtime environment.
+ * It's expected that when the runtime environment is the node runtime, that any
+ * base response is a NodeNextResponse.
+ */
+export declare const isNodeNextResponse: (res: BaseNextResponse) => res is NodeNextResponse;