docs: move navigation from top tabs to left sidebar

Remove navigation.tabs feature to display all navigation sections
in the left sidebar instead of horizontal tabs in the header.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

Author: jayhesselberth

mkdocs.yml

@@ -8,7 +8,6 @@ edit_uri: edit/docs/docs/
 theme:
   name: material
   features:
-    - navigation.tabs
     - navigation.sections
     - navigation.expand
     - navigation.top