CodePress CMS v1.8.0: BotGuard security engine, HAProxy docs & ARIA fix

- Implement BotGuard security engine (Bot, AI, Scraper & Empty UA blocking)
- Add Admin Security page (/admin/security) with toggles, rate limiter & block/allowlists
- Add per-IP RateLimiter handoff in index.php with HTTP 429 response
- Add dynamic /robots.txt generation and noai/noimageai meta tags
- Add RequestLogger status column and blocked badges in admin request logs
- Fix ARIAComponents.php syntax errors on lines 67, 137, 262
- Add HAProxy / PFSense bot blocking & IP forwarding guide (docs/haproxy-bot-blocking.md)
- Update version to 1.8.0 with release notes in version.php and guides

cms/templates/layout.mustache

@@ -18,6 +18,13 @@
     <!-- SEO Meta Tags -->
     <meta name="description" content="{{seo_description}}">
     <meta name="keywords" content="{{seo_keywords}}">
+    {{#block_ai_bots}}
+    <meta name="robots" content="noai, noimageai">
+    <meta name="tdm-reservation" content="1">
+    {{/block_ai_bots}}
+    {{#block_search_engines}}
+    <meta name="robots" content="noindex, nofollow">
+    {{/block_search_engines}}
     
     <!-- Author Links -->
     <link rel="author" href="{{author_website}}">