re-import deprecated dark tokens

[jordanjones243]

Alaska Airlines Pull Request

Please include a summary of the change and which issue is fixed. Please also include relevant motivation and context. List any dependencies that are required for this change.

Fixes: #91

Summary:

Please summarize the scope of the changes you have submitted, what the intent of the work is and anything that describes the before/after state of the project.

Re-import the on-dark tokens that were in the original design token file in order to prevent any color issues for those using the original design token file.

Type of change:

Please delete options that are not relevant.

• [ ] New capability
• [x] Revision of an existing capability
• [ ] Infrastructure change (automation, etc.)
• [ ] Other (please elaborate)

Checklist:

• [x] My update follows the CONTRIBUTING guidelines of this project
• [x] I have performed a self-review of my own update

By submitting this Pull Request, I confirm that my contribution is made under the terms of the Apache 2.0 license.

Pull Requests will be evaluated by their quality of update and whether it is consistent with the goals and values of this project. Any submission is to be considered a conversation between the submitter and the maintainers of this project and may require changes to your submission.

Thank you for your submission!
-- Auro Design System Team

[AuroDesignSystem]

:tada: This PR is included in version 3.12.1 :tada:

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