Add more information and refactor format of award emoji-related topics
What does this MR do?
Establishes deeper links between the API documentation for award emojis and the main content. Also refactors some formatting to suit newer styles.
Related issues
Relates to: https://gitlab.com/gitlab-org/gitlab-ce/issues/10421.
Author's checklist
Review checklist
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Your team's review (required) -
Technical writer's review (required)
Edited by Achilleas Pipinellis