Update version to 2.1 and derive version information from H5public.h, removing h5vers script and updating CMake and Java configurations.
Versioning:
Update version to 2.1 in H5public.h.
Derive version strings in H5public.h using macros.
CMake:
Extract version from H5public.h in HDF5config.cmake and HDF5AsSubdirMacros.cmake.
Configure README.md and CHANGELOG.md using CMakeLists.txt.
Java:
Generate H5Version.java from H5public.h for version consistency.
Update H5.java to use H5Version for version constants.
Removals:
Delete bin/h5vers script, previously used for version management.
FFM build requires Java 25, Jextract 25.
Generates FFM bindings during configure.
JNI is default when the requirements are not met or can be forced.
Presets added for maven and FFM - JNI is default selection.
Enhanced Maven options will work with either JNI or FFM
New Workflows for testing and maven uploads.
Extensive documentation changes for java.
Scot Breitenfeld
Larry Knox
Allen Byrne