Lint changelog entries

[filipsobol]

🚀 Summary

Internal: Lint changelog entries.

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📌 Related issues

• Closes Create a rule for checking changelog entry files #18777

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💡 Additional information

⚠️ Blocked by ckeditor/ckeditor5-linters-config#71

[CKEditorBot]

📢 Changelog entry reminder

Hi there! 👋

Thanks for opening this pull request! If your changes affect end users, please add a changelog entry to describe them.
We use a Markdown-based system - see the Changelog entries guide for details.

✍️ How to

Run the following command:

yarn run nice

This guide will help you create a new changelog file. You can add as many entries as needed – one per distinct change.

Note

Skip internal changes, such as typo fixes or refactors, as they won't be included in the published changelog.

Tip

Reviewers do not need to copy anything into the merge commit message when merging the pull request.

[pomek]

@filipsobol, could we add the new rule to the - https://ckeditor.com/docs/ckeditor5/latest/framework/contributing/code-style.html#ckeditor-5-custom-eslint-rules - guide?

[filipsobol]

@filipsobol, could we add the new rule to the - https://ckeditor.com/docs/ckeditor5/latest/framework/contributing/code-style.html#ckeditor-5-custom-eslint-rules - guide?

Done.

[pomek]

LGTM.