Add complete developer tooling into Nix environment

[quantum9Innovation]

Aside from simulation support, developer tooling is extremely important. As the Arcturus codebase evolves, it will greatly improve quality of life to bundle useful tools into a secondary environment that will not be built in production. To some extent, some useful packages that are not strictly necessary for the code to build are included in the arcturus-nix flake, but these should be separated from actual dependencies before adding more to avoid accumulating bloat and angering Helix users.