Update directory structure and rename from Cppyy->CppJIT - #14

Node.js 20 is deprecated. The following actions target Node.js 20 but are being forced to run on Node.js 24: actions/checkout@v4, actions/setup-python@v5, actions/upload-artifact@v4. For more information see: https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/

flavor=llvm-release source=recipe-cache prefix=/home/runner/work/cppjit/cppjit/install

995 MiB

llvm-release-22-ubuntu-24.04-x86_64-b5dc5b5301358ffa