Make group_join generic

[pan93412]

This pull request makes minor improvements to the group_join utility function and its usage in the settings embed logic. The changes enhance type flexibility and maintain code clarity.

• Utility function improvements:

  • Changed the group_join function parameter from list[str] to Iterable[str] to allow more flexible input types. (src/utils.py)
  • Updated the initialization of the groups variable in group_join to use type hinting with list[str]() for clarity. (src/utils.py)

• Usage update:

  • Adjusted the call to group_join in the embed method to pass a generator expression instead of a list comprehension, leveraging the new Iterable[str] parameter type. (src/settings.py)

[github-actions]

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[pan93412]

I have read the CLA Document and I hereby sign the CLA

[Kyrela]

Thank you!