added some dev apps and services

user/dev/tools/git.nix

@@ -0,0 +1,7 @@
+{ config, pkgs, userSettings, ... }:
+{
+  home.packages = [ pkgs.git ];
+  programs.git.enable = true;
+  programs.git.userName = userSettings.name;
+  programs.git.userEmail = userSettings.email-dev;
+}