chore: create production-v2 branch with content only

This branch contains ONLY:
- Pages (config/www/user/pages/)
- Themes (config/www/user/themes/)
- Plugins (config/www/user/plugins/)
- PRODUCTION.md
- Minimal .gitignore

Clean slate for production deployment.
All development files, configs, scripts removed.

config/www/user/themes/quark/blueprints/default.yaml

@@ -0,0 +1,15 @@
+extends@: default
+
+form:
+  fields:
+    tabs:
+      fields:
+        advanced:
+          fields:
+            columns:
+              fields:
+                column1:
+                   fields:
+                     header.body_classes:
+                       markdown: true
+                       description: 'Available classes in Quark Theme (space separated):<br />`header-fixed`, `header-animated`, `header-dark`, `header-transparent`, `sticky-footer`'