refactor(docs): refine explainer pages layout and animations

- Fix visibility of Retrieved Context items on Page 4
- Reduce margins and improve layout of Decoding Attention section
- Implement smart terminal scrolling (max 12 lines)
- Add embedding visualization animation
- Update observatory visualization plan

Author: jadercorrea

docs/_config.yml

@@ -22,6 +22,9 @@ plugins:
   - jekyll-feed
   - jekyll-seo-tag
 
+# Server configuration
+port: 4040
+
 defaults:
   - scope:
       path: ""