Build and development with Nix

The recommended way to install dependencies on the Torus Node project is using Nix and direnv.

You can install Nix with the Determinate Nix Installer:

curl --proto '=https' --tlsv1.2 -sSf -L https://install.determinate.systems/nix | sh -s -- install

With direnv

You can then install and use direnv to automatically load the environment:

Install direnv:
```
nix profile install nixpkgs#direnv
```
Add to your ~/.zshrc and reload your shell if you're using zsh:
```
eval "$(direnv hook zsh)"
```
For bash, add to your ~/.bashrc:
```
eval "$(direnv hook bash)"
```
Run direnv allow inside the project directory to enable it.

You can also manually load the environment:

nix develop