Merge pull request #8018 from metabase/0.30-docs

docs/administration-guide/01-managing-databases.md

docs/administration-guide/04-managing-users.md

docs/administration-guide/05-setting-permissions.md

docs/administration-guide/06-collections.md

docs/administration-guide/10-single-sign-on.md

docs/administration-guide/11-getting-started-guide.md

docs/administration-guide/images/ProfileDropdown.png

docs/administration-guide/images/RemoveUser.png

...nistration-guide/images/collections/collection-detail.png

...ation-guide/images/collections/collection-permissions.png

...tion-guide/images/collections/collections-empty-state.png

...nistration-guide/images/collections/create-collection.png

...ministration-guide/images/collections/permission-grid.png

...n-guide/images/collections/personal-collection-detail.png

...tration-guide/images/collections/personal-collections.png

.../administration-guide/images/collections/pinned-items.png

docs/administration-guide/start.md

docs/users-guide/01-what-is-metabase.md

docs/users-guide/03-basic-exploration.md

docs/users-guide/04-asking-questions.md