Mac portion of Dullahan 1.21

[RyeMutt]

Description

Includes build and packaging changes to support Dullahan 1.21 on macOS

Related Issues

• Please link to a relevant GitHub issue for additional context.
  • Bug Fix: Link to an issue that includes reproduction steps and testing guidance.
  • Feature/Enhancement: Link to an issue with a write-up, rationale, and requirements.

Issue Link:

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Checklist

Please ensure the following before requesting review:

• [ X] I have provided a clear title and detailed description for this pull request.
• [ X] If useful, I have included media such as screenshots and video to show off my changes.
• [ X] The PR is linked to a relevant issue with sufficient context.
• [ X] I have tested the changes locally and verified they work as intended.
• [ X] All new and existing tests pass.
• [ X] Code follows the project's style guidelines.
• [ X] Documentation has been updated if needed.
• [ X] Any dependent changes have been merged and published in downstream modules
• [ X] I have reviewed the contributing guidelines.

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Additional Notes

[callumlinden]

What is the additional XML library required for?

[callumlinden]

Curious what LLXML is required for but other than that, look ok.

[Dan-Linden]

Is any testing needed for this?

[callumlinden]

Nothing above and beyond testing the updated CEF