chore: add description to package.json to improve visibility

[pataar]

This adds a description to the repo to improve visibility in the React Native Directory.

Currently there's nothing there:

According to the maintainers of the directory, a description is needed in the package.json:
react-native-community/directory#1676 (comment)

[changeset-bot]

⚠️ No Changeset found

Latest commit: e8a5f8e

Merging this PR will not cause a version bump for any packages. If these changes should not result in a new version, you're good to go. If these changes should result in a version bump, you need to add a changeset.

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Name	Status	Preview	Comments	Updated (UTC)
victory-native-xl-docs	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Jun 5, 2025 4:40pm

[zibs]

Thanks!!