Replace v1 with v2 codebase

Full rewrite: swap out the v1 framework (src/, controllers/, views/,
twig/, sass/, skeleton/) for the working v2 codebase from phpproject
(App/, novaconium/, public/).

App/pages/blog/index.php

@@ -0,0 +1,30 @@
+<?php
+
+// Every post under App/pages/blog/ is now a plain, sidecar-less directory
+// with its own index.twig — none of them are driven by a repository or
+// database, so this listing is just a hand-maintained array pointing at
+// each one. Add a new entry here whenever a new post directory is added.
+return [
+    'posts' => [
+        [
+            'slug'    => 'hello-world',
+            'title'   => 'Hello, World!',
+            'excerpt' => 'The first post on this blog — a plain sidecar-less page, like every other post here now.',
+        ],
+        [
+            'slug'    => 'second-post',
+            'title'   => 'A Second Post',
+            'excerpt' => 'A second post at its own URL, showing that adding a new page under App/pages/blog/ needs nothing but a new directory.',
+        ],
+        [
+            'slug'    => 'twig-syntax-guide',
+            'title'   => 'Twig Syntax Guide',
+            'excerpt' => 'A tour of the Twig syntax used throughout this site — output, filters, control structures, template inheritance, and a few gotchas worth knowing.',
+        ],
+        [
+            'slug'    => 'style-guide',
+            'title'   => 'Style Guide',
+            'excerpt' => "A showcase of this theme's default styling for headings, lists, tables, code, and other common HTML elements.",
+        ],
+    ],
+];