reorder cli commands navigations are now into a nav sub group

examples/demo.sh

@@ -43,8 +43,8 @@ pause
 header "3/8 · Create 'research' group and open URLs into it"
 $CLI group create research
 echo ""
-$CLI open https://example.com   --group research --bg
-$CLI open https://wikipedia.org --group research --bg
+$CLI nav open https://example.com   --group research --bg
+$CLI nav open https://wikipedia.org --group research --bg
 echo ""
 echo "  Tabs are now open inside the 'research' group in your browser."
 pause
@@ -63,7 +63,7 @@ pause
 
 header "6/8 · DOM and content extraction (active tab)"
 echo "  Switching to the example.com tab first..."
-$CLI focus example.com
+$CLI nav focus example.com
 echo ""
 echo "  Page headings:"
 $CLI dom text h1