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/sharp/lib/is.js

@@ -0,0 +1,143 @@
+/*!
+  Copyright 2013 Lovell Fuller and others.
+  SPDX-License-Identifier: Apache-2.0
+*/
+
+/**
+ * Is this value defined and not null?
+ * @private
+ */
+const defined = (val) => typeof val !== 'undefined' && val !== null;
+
+/**
+ * Is this value an object?
+ * @private
+ */
+const object = (val) => typeof val === 'object';
+
+/**
+ * Is this value a plain object?
+ * @private
+ */
+const plainObject = (val) => Object.prototype.toString.call(val) === '[object Object]';
+
+/**
+ * Is this value a function?
+ * @private
+ */
+const fn = (val) => typeof val === 'function';
+
+/**
+ * Is this value a boolean?
+ * @private
+ */
+const bool = (val) => typeof val === 'boolean';
+
+/**
+ * Is this value a Buffer object?
+ * @private
+ */
+const buffer = (val) => val instanceof Buffer;
+
+/**
+ * Is this value a typed array object?. E.g. Uint8Array or Uint8ClampedArray?
+ * @private
+ */
+const typedArray = (val) => {
+  if (defined(val)) {
+    switch (val.constructor) {
+      case Uint8Array:
+      case Uint8ClampedArray:
+      case Int8Array:
+      case Uint16Array:
+      case Int16Array:
+      case Uint32Array:
+      case Int32Array:
+      case Float32Array:
+      case Float64Array:
+        return true;
+    }
+  }
+
+  return false;
+};
+
+/**
+ * Is this value an ArrayBuffer object?
+ * @private
+ */
+const arrayBuffer = (val) => val instanceof ArrayBuffer;
+
+/**
+ * Is this value a non-empty string?
+ * @private
+ */
+const string = (val) => typeof val === 'string' && val.length > 0;
+
+/**
+ * Is this value a real number?
+ * @private
+ */
+const number = (val) => typeof val === 'number' && !Number.isNaN(val);
+
+/**
+ * Is this value an integer?
+ * @private
+ */
+const integer = (val) => Number.isInteger(val);
+
+/**
+ * Is this value within an inclusive given range?
+ * @private
+ */
+const inRange = (val, min, max) => val >= min && val <= max;
+
+/**
+ * Is this value within the elements of an array?
+ * @private
+ */
+const inArray = (val, list) => list.includes(val);
+
+/**
+ * Create an Error with a message relating to an invalid parameter.
+ *
+ * @param {string} name - parameter name.
+ * @param {string} expected - description of the type/value/range expected.
+ * @param {*} actual - the value received.
+ * @returns {Error} Containing the formatted message.
+ * @private
+ */
+const invalidParameterError = (name, expected, actual) => new Error(
+    `Expected ${expected} for ${name} but received ${actual} of type ${typeof actual}`
+  );
+
+/**
+ * Ensures an Error from C++ contains a JS stack.
+ *
+ * @param {Error} native - Error with message from C++.
+ * @param {Error} context - Error with stack from JS.
+ * @returns {Error} Error with message and stack.
+ * @private
+ */
+const nativeError = (native, context) => {
+  context.message = native.message;
+  return context;
+};
+
+module.exports = {
+  defined,
+  object,
+  plainObject,
+  fn,
+  bool,
+  buffer,
+  typedArray,
+  arrayBuffer,
+  string,
+  number,
+  integer,
+  inRange,
+  inArray,
+  invalidParameterError,
+  nativeError
+};