✨ Support `tvosX64` Kotlin Native target

[LVMVRQUXL]

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📝 Description

We would like to support the tvosX64 Kotlin Native target.

See the targets supported by Kotlin Native for more details about it.

✅ Checklist

• [ ] ✨ Add the target in the Gradle convention plugin for Kotlin Multiplatform.
• [ ] 📝 Add a badge for the new target in the README documentation of the root Gradle project.
• [ ] 📝 Add a badge for the new target in the README documentation of the types-kotlinx-serialization Gradle project.
• [ ] 📝 Update the unreleased changelog for this issue.