NixOS Configuration for AppDaemon Development

Needs a `git.nix` file. Example below:

```shell
{ ... }:
{
  programs.git = {
    enable = true;
    extraConfig.credential.helper = "store --file ~/.git-credentials";
    userName = "John Lancaster";
    userEmail = "32917998+jsl12@users.noreply.github.com";
  };
}
```