Merge branch '483059-vue-todo-empty-state' into 'master'

Add EmptyState component to new Vue To-Do app

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/165211



Merged-by: Lukas Eipert <leipert@gitlab.com>
Approved-by: Amelia Bauerly <abauerly@gitlab.com>
Approved-by: Ryan Cobb <rcobb@gitlab.com>
Approved-by: Lukas Eipert <leipert@gitlab.com>
Approved-by: Aakriti Gupta <agupta@gitlab.com>
Co-authored-by: Thomas Hutterer <thutterer@gitlab.com>