DEPRECATION: add deprecation warning to this package

[DukeFerdinand]

Resolves AlaskaAirlines/auro-formkit#394, adding deprecation warning to old form element repositories.

Summary by Sourcery

Chores:

• Marks the package as deprecated and directs users to migrate to Auro Formkit.

[sourcery-ai]

Reviewer's Guide by Sourcery

This pull request adds a deprecation warning to the README file of the component, advising users to migrate to the new Auro Formkit.

No diagrams generated as the changes look simple and do not need a visual representation.

File-Level Changes

Change	Details	Files
Added a deprecation warning to the README file.	Added a warning message indicating that the component is deprecated and users should migrate to Auro Formkit.	README.md

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[github-actions]

Surge demo deployment failed! 😭

[sourcery-ai]

Hey @DukeFerdinand - I've reviewed your changes - here's some feedback:

Overall Comments:

• Consider adding a date for when the deprecation goes into effect.

Here's what I looked at during the review

• 🟡 General issues: 1 issue found
• 🟢 Security: all looks good
• 🟢 Testing: all looks good
• 🟢 Complexity: all looks good
• 🟢 Documentation: all looks good

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[sourcery-ai]

issue (typo): Typo in package name and redundant wording in deprecation notice.

The package name in the link should be @aurodesignsystem/auro-formkit. Also, "is deprecated and is no longer supported" is redundant. Suggest simplifying to "This component is deprecated. Please migrate to..."

Suggested change

	> **WARNING:** This component is deprecated and is no longer supported. Please migrate to the new [Auro Formkit](https://www.npmjs.com/package/@aurodesignsystem/auro-formkit) instead.
	> **WARNING:** This component is deprecated. Please migrate to the new [Auro Formkit](https://www.npmjs.com/package/@aurodesignsystem/auro-formkit).