chore: Migrate to embedded stories instead of examples
This migrates the following component docs to use embedded stories instead of examples:
- accordion: https://4456656-review-1203-migra-fs6qj5.service-staging.gitlab.org/components/accordion
- avatar: https://4456656-review-1203-migra-fs6qj5.service-staging.gitlab.org/components/avatar
- broadcast-message: https://4456656-review-1203-migra-fs6qj5.service-staging.gitlab.org/components/broadcast-message
- card: https://4456656-review-1203-migra-fs6qj5.service-staging.gitlab.org/components/card
- label: https://4456656-review-1203-migra-fs6qj5.service-staging.gitlab.org/components/label
Related to #1203 (closed)
Edited by Jeremy Elder