Merge branch '290989-add-metadata' into 'master'

Add stage / group metadata to Editor Lite page

See merge request gitlab-org/gitlab!49755

doc/development/fe_guide/editor_lite.md

 ---
-stage: none
-group: unassigned
+stage: Create
+group: Editor
 info: To determine the technical writer assigned to the Stage/Group associated with this page, see https://about.gitlab.com/handbook/engineering/ux/technical-writing/#assignments
 ---