Documentation is missing the `Emitter` class

[lengau]

Bug Description

The auto-generated documentation doesn't contain documentation for the Emitter class.

To Reproduce

https://canonical-craft-cli.readthedocs-hosted.com/en/latest/search/?q=Emitter&check_keywords=yes&area=default

part yaml

Relevant log output

n/a

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The internal ticket has been created: https://warthogs.atlassian.net/browse/CRAFT-4188.

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[syncronize-issues-to-jira]

Thank you for reporting your feedback to us!

The internal ticket has been created: https://warthogs.atlassian.net/browse/CRAFT-4187.

This message was autogenerated

[syncronize-issues-to-jira]

Thank you for reporting your feedback to us!

The internal ticket has been created: https://warthogs.atlassian.net/browse/CRAFT-4189.

This message was autogenerated