Fix guide template variable replacement and enhance documentation

- Fix template variable replacement in guide pages by removing {{}} brackets
- Escape code blocks in guide markdown to prevent template processing
- Completely rewrite guide documentation with comprehensive CMS features
- Add bilingual guide support (English/Dutch) with detailed examples
- Enhance CodePressCMS core with improved guide page handling
- Update template system with better layout and footer components
- Improve language files with additional translations
- Update configuration with enhanced theme and language settings

Resolves issue where guide pages were showing replaced template variables
instead of displaying them as documentation examples.

plugins/MQTTTracker/config.json

@@ -0,0 +1,15 @@
+{
+    "enabled": true,
+    "settings": {
+        "broker_host": "localhost",
+        "broker_port": 1883,
+        "client_id": "codepress_cms",
+        "username": "",
+        "password": "",
+        "topic_prefix": "codepress",
+        "track_visitors": true,
+        "track_pages": true,
+        "track_performance": true,
+        "session_timeout": 1800
+    }
+}