license 3.1.0

- Added the FAFLO-0.2 Hippocratic-3.0-full licenses
- Added Nix support
- Remove dependency venerability

Sashanoraa (8):
      Update arch package
      Update deps and remove time 0.1 from deps
      Add license FAFLO-0.2
      Add license Hippocratic-3.0-full
      Add Nix dev env
      Add Nix flake
      _incr_version script sets flake version
      Add flake info to README