Improve annotations for entity category functions

[Garanas]

Description of the proposed changes

Extends the annotations to indicate that some of them also work with a list of unit identifiers, such as uel0001.

Testing done on the proposed changes

Repurposed a hotkey to call the functions from the UI with test data.

Checklist

• [x] Changes are annotated, including comments where useful
• [x] Changes are documented in a changelog snippet according to the guidelines.
• [ ] Request 2-3 reviewers from the list of reviewers and their areas of knowledge.

Summary by CodeRabbit

• Chores
  • Improved type annotations and documentation for entity category utilities to enhance developer clarity and reliability.
• Documentation
  • Added a changelog entry summarizing the updates.

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