Links and discussion for better interop

[kpgalligan]

Annotations for better header production:

• HiddenFromObjC and ShouldRefineInSwift annotations JetBrains/kotlin#4818
• ObjCName annotation JetBrains/kotlin#4815

Tracking issues for better Objc export:

https://youtrack.jetbrains.com/issue/KT-42297/Improve-exporting-Kotlin-code-to-Objective-C

[DanielSouzaBertoldi]

The listed PRs have been merged and the issue on YT has been shelved due to lack of discussions. Closing this for now.