Restore left nav and use Home page title (#44)

## Summary
- remove explicit nav override so the full left navigation is
auto-generated
- keep top tabs disabled by not enabling 
avigation.tabs`n- rename the first page heading in README to Home

---------

Co-authored-by: Copilot App <223556219+Copilot@users.noreply.github.com>

Author: MariusStorhaug

README.md

@@ -1,4 +1,4 @@
-# {{ NAME }}
+# Home
 
 {{ DESCRIPTION }}