Add post-setup flow with auto dashboard suggestions

frontend/src/metabase/components/ExplorePane.jsx

frontend/src/metabase/components/MetabotLogo.jsx

frontend/src/metabase/css/core/text.css

frontend/src/metabase/routes.jsx

frontend/src/metabase/services.js

frontend/src/metabase/setup/components/ExploreStep.jsx

frontend/src/metabase/setup/components/Setup.jsx

frontend/src/metabase/setup/containers/PostSetupApp.jsx