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/).

public/.htaccess

@@ -0,0 +1,17 @@
+RewriteEngine On
+
+# 1) Canonical URLs: strip trailing slash (except bare root) — 301 for SEO.
+RewriteCond %{REQUEST_URI} ^/.+/$
+RewriteRule ^(.+)/$ /$1 [R=301,L]
+
+# 2) Serve pre-rendered static cache file directly, bypassing PHP entirely.
+RewriteCond %{DOCUMENT_ROOT}/cache/$1/index.html -f
+RewriteRule ^(.*)$ /cache/$1/index.html [L]
+
+# 3) Serve real files/directories as-is (css, cache assets, etc.).
+RewriteCond %{REQUEST_FILENAME} -f [OR]
+RewriteCond %{REQUEST_FILENAME} -d
+RewriteRule ^ - [L]
+
+# 4) Everything else goes through the front controller.
+RewriteRule ^ index.php [L]