This brings the getting started post closer to the configuration used
for the example site by using `feed` as the feed's basename.
Moreover, `enableRobotsTXT` was missing from the TOML configuration.
The getting started post contains a few inconsistencies:
- The atom feed does not work due to a typo
- The menu icons do not show up due to wrong icon names
- The full configuration does not mention `pluralizeListTitles` and
`paginate`
BREAKING CHANGE:
The icon gdoc_telescope was removed. If you are using this icon you have to replace it.
Build-in icons are prefixed with gdoc_ now. If you use built-in icons in e.g. menus you have to rename these references!
* feat: add optional extra menu to site navigations
* add extra menu documentation
* rename menu to menu-extra
* feat: add optional extra menu to site navigations
* add extra menu documentation
* rename menu to menu-extra
* fix spellcheck