feat(theme): implement Telekom design system with magenta color scheme

- Add TeleNeo font family with all weights (300-700)
- Implement Telekom brand colors (magenta #E20074 as primary)
- Add dark mode support with inverted color palette
- Style navigation with soft hover states and active indicators
- Override Bootstrap/Docsy variables for consistent theming
- Fix deprecated Hugo template syntax for Disqus integration
- Apply Telekom-inspired styling to all UI components

layouts/docs/single.html

@@ -8,7 +8,7 @@
 		{{ partial "feedback.html" .Site.Params.ui.feedback }}
                 <br />
         {{ end }}
-        {{ if (.Site.DisqusShortname) }}
+        {{ if (.Site.Config.Services.Disqus.Shortname) }}
                 <br />
                 {{ partial "disqus-comment.html" . }}
         {{ end }}