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/fraction.js/examples/tape-measure.js

@@ -0,0 +1,16 @@
+/*
+Fraction.js v5.0.0 10/1/2024
+https://raw.org/article/rational-numbers-in-javascript/
+
+Copyright (c) 2024, Robert Eisele (https://raw.org/)
+Licensed under the MIT license.
+*/
+const Fraction = require('fraction.js');
+
+function closestTapeMeasure(frac) {
+
+    // A tape measure is usually divided in parts of 1/16
+
+    return Fraction(frac).roundTo("1/16");
+}
+console.log(closestTapeMeasure("1/3")); // 5/16