fix: code blocks rendering + consistent styling with ciphera-website /learn

- Convert MDX CodeBlock components to standard markdown code fences
- Add rehype-mdx-code-props to pass filename meta to code components
- Custom pre/code MDX components map fences to CodeBlock
- Add brand color badges (product + category) matching /learn layout
- Match prose styling: orange inline code, orange links, white strong
- Remove brand color background glow (not in /learn)

content/integrations/wordpress.mdx

@@ -16,11 +16,13 @@ Add the Pulse script via a plugin or by editing your theme's header file directl
 
 The easiest way is to use the [WPCode (Insert Headers and Footers)](https://wordpress.org/plugins/insert-headers-and-footers/) plugin. Install it, then go to **Code Snippets -> Header & Footer** and paste the Pulse script into the Header section.
 
-<CodeBlock filename="Header Script">{`<script
+```html filename="Header Script"
+<script
   defer
   data-domain="your-site.com"
   src="https://pulse.ciphera.net/script.js"
-></script>`}</CodeBlock>
+></script>
+```
 
 ## Method 2: Edit header.php directly