Add SPDX license headers across repository and introduce license metadata and header checker#1

arty-kk merged 3 commits into

mainarty-kk/SpiralAutonomyKernel:mainfrom

codex/align-repository-with-apache-2.0-licensingarty-kk/SpiralAutonomyKernel:codex/align-repository-with-apache-2.0-licensingCopy head branch name to clipboard