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/quark.yaml

@@ -0,0 +1,12 @@
+enabled: true
+production-mode: true
+grid-size: grid-lg
+header-fixed: true
+header-animated: true
+header-dark: false
+header-transparent: false
+sticky-footer: true
+blog-page: '/blog'
+spectre:
+  exp: false
+  icons: false