🪛 Comments, git safe dir, moved nixvim import

- Moved nixvim import to nixvim directory
- Added git safe directory to /etc/nixos

home-manager/fish.nix

@@ -20,6 +20,7 @@ in
       plugins = [
         {
           # !! to get the previous command
+          # https://github.com/BrewingWeasel/fishbang
           name = "fishbang";
           src = pkgs.fetchFromGitHub {
             owner = "BrewingWeasel";