JEP 401 Value Objects Preview Merged to OpenJDK Master

JEP 401: Value Objects (Preview) merged to OpenJDK master

I am pleased to announce the integration of the first preview for JEP 401, Value Objects, into the OpenJDK master branch. This significant update also includes JEP 539, Strict Field Initialization, which is essential for the new feature. The implementation spans the Java language, JVM, and standard library, involving over two thousand commits. Reviewers are encouraged to direct feedback to specific sub-review pull requests to manage the scale of this change effectively.