CMS 2.0 - Theme engine, logging, admin improvements

Major changes:
- New ThemeManager with Twig templating and SCSS compilation
- Dynamic themes system (themes/default, themes/demo)
- LogManager with SQLite storage and syslog forwarding
- RequestLogger with static helper methods
- Admin UI overhaul (Bootstrap 5, dark mode)
- Admin config page with logging and theme settings
- Admin logs page with filters and search
- Removed legacy Mustache templates
- Removed test plugin and theme
- Composer dependencies: Twig, scssphp, CommonMark, MaxMind GeoIP

vendor/maxmind-db/reader/ext/tests/003-open-basedir.phpt

@@ -0,0 +1,12 @@
+--TEST--
+openbase_dir is followed
+--INI--
+open_basedir=/--dne--
+--FILE--
+<?php
+use MaxMind\Db\Reader;
+
+$reader = new Reader('/usr/local/share/GeoIP/GeoIP2-City.mmdb');
+?>
+--EXPECTREGEX--
+.*open_basedir restriction in effect.*