- format all `.nix` files using `alejandra`
- check format on `nix flake check`
- only `exec $SHELL` when bash is interactive
Signed-off-by: Philipp Jungkamp <philipp.jungkamp@rwth-aachen.de>
- add basic flake structure
- add configurable package for `villas`
- add `README` tutorial as motivation
- add package for `lib60870` and `libiec61850` not provided by `nixpkgs`
Signed-off-by: Philipp Jungkamp <philipp.jungkamp@rwth-aachen.de>