* Generate package-info files for all impl and mixin packages
* Add javadoc to generated package-infos, use multiline string
* Simplify code
* Remove manual ApiStatus.Internal on impl classes
* Update CONTRIBUTING.md to remove ApiStatus.Internal for impl classes
* Fix Gradle deprecations
* Fix more Gradle deprecations
* Add task metadata
* Support client-main split
* Remove workaround for client packages
* Try to fix Gradle 8 deprecations
* Try to fix Gradle 8 deprecations, part 2
I'm hoping that using the SourceDirectorySet instead of converting it to a
Set<File> (which is pointless?) will carry the build dependencies over.
* Add clean packageInfo task
Co-authored-by: modmuss50 <modmuss50@gmail.com>
(cherry picked from commit 0d0f21023d)
