Chore/add busy indicator service documentation

[Alex-Oxthorn]

PR Checklist

Please check if your PR fulfills the following requirements:

• Tests for the changes have been added/updated: [N]
• Docs have been added/updated: [Y]
• Does this PR introduce a breaking change? [N]
• I have linked any related GitHub issues to be closed when this PR is merged? [Y/N]

Describe the new behavior?

No new behavior. Just updated docs.

[changeset-bot]

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Latest commit: 811ab69

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