Add --version support across VDF/HW CLIs

[hoffmang9]

Summary

• Add --version handling to vdf_client, vdf_bench, hw_test, and hw_vdf_client so each binary can print its embedded version and exit.
• Introduce shared src/version.hpp and wire CHIAVDF_VERSION into both Makefile and CMake builds with a git describe fallback to dev.
• Propagate release tag versioning through unified CI so release builds embed the release tag in CLI binaries.

Test plan

• Run make -f src/Makefile.vdf-client vdf_client vdf_bench hw_test hw_vdf_client
• Verify src/vdf_client --version
• Verify src/vdf_bench --version
• Verify src/hw_test --version
• Verify src/hw_vdf_client --version

Made with Cursor

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Note

Low Risk
Mostly additive CLI/build metadata changes; low functional risk aside from minor argument-parsing/CI build-flag wiring.

Overview
Adds --version across vdf_client, vdf_bench, hw_test, and hw_vdf_client, using a shared version.hpp helper to print the embedded version and exit.

Introduces a build-time CHIAVDF_VERSION macro wired through both Makefile.vdf-client and CMakeLists.txt (defaulting to git describe or dev), and updates the vdf-client-hw GitHub Actions workflow to pin that version to the release tag for release builds (including Windows CMake builds).

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