Add text wrap balance

[ellynliu]

Link: preview

Add an atomic for text-wrap-balance

Testing

1. Step one
2. Step two
   Expected result:

Additional information

[Optional]

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[changeset-bot]

🦋 Changeset detected

Latest commit: 9a7262b

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 2 packages

Name	Type
@microsoft/atlas-site	Minor
@microsoft/atlas-css	Minor

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