Fix diff blocks, links, remove footnotes & rearrange sections in docs

Extract performance into separate sectin into shoving it under search
Create page for web interface

docs/_sidebar.md

@@ -1,18 +1,20 @@
-- Getting Started
-    - [Overview](README.md)
+- Get Started
+    - [Overview](overview.md)
     - [Install](setup.md)
         - [Windows Installation](windows_install.md)
-- Learn More
+    - [Demos](demos.md)
+- Use
     - [Features](features.md)
         - [Chat](chat.md)
         - [Search](search.md)
-    - [Demos](demos.md)
     - Interfaces
         - [Obsidian](obsidian.md)
         - [Emacs](emacs.md)
+        - [Web](web.md)
     - Data Sources
         - [Github](github_integration.md)
         - [Notion](notion_integration.md)
     - [Advanced](advanced.md)
+    - [Performance](performance.md)
 - Contributing
     - [Development](development.md)