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fbffca3b - Update cmake & meson version handling (#522)

Update cmake & meson version handling (#522) * updated the version handling - Introduces a new version.txt file - This file is parsed by CMake to determine the current version * assign version in project call * use version variable * Meson update 1. Minor fix for GCC build 2. Use external version file which can be used by CMake as well * get version from git tag now * ci/cd broke.. * maybe this solves the error * updated workflow files * one last test * remove git describe call