Adding ament_generate_version_header(..) to these packages?

[gavanderhoorn]

Feature request

Feature description

Would it be OK to add a call to ament_generate_version_header(..) to the CMakeLists.txt of the packages in this repository to allow dependent packages to check for specific (minimum) versions?

According to the Changelog this is supported since Humble, and would be of great use to packages which desire to conditionally compile specific code paths (avoid branching, etc).

AFAICT, only rclcpp currently exports that header (ros2/rclcpp#1886), so the suggestion is to add it to rcl (and a bunch of other core packages as well).

[gavanderhoorn]

As I have other packages for which I'd like to use the macros defined in the version.h generated by ament_generate_version_header(..): would PRs against other core repositories also be welcome?