Refactor CI to clearly separate virtualenv-based container tests from pure Nix flake tests across all distros (arch, debian, ubuntu, fedora, centos).
Introduce dedicated test-env-nix workflow and Makefile targets, rename former container tests to test-env-virtual, and update stable pipeline dependencies.
Improve Nix reliability in containers by fixing installer permissions and explicitly validating nix availability and version during image build and tests.
- Split virgin tests into separate root and user GitHub Actions workflows
(test-virgin-root, test-virgin-user) and adjust Arch container flows
- Introduce scripts/installation/venv-create.sh and reuse it from
scripts/installation/main.sh with separate root/system and user/dev paths
- Add PKGMGR architecture & setup map (assets/map.png) and section in README
with link to the up-to-date master page
- Simplify README by removing outdated Docker quickstart, usage examples,
and AI footer
- Extend .gitignore to exclude src/source artifacts
https://chatgpt.com/share/6939bbfe-5cb0-800f-8ea8-95628dc911f5
