feat: refactor home-manager configs

modules/home-manager/git/git.nix

@@ -0,0 +1,41 @@
+{
+  config,
+  lib,
+  pkgs,
+  ...
+}:
+
+let
+  cfg = config.feature.git;
+in
+{
+  options.feature.git.enable = lib.mkEnableOption "Set up git";
+
+  config = {
+    programs.git = {
+      delta.enable = true;
+      enable = true;
+      extraConfig = {
+        diff = {
+          algorithm = "histogram";
+        };
+        init = {
+          defaultBranch = "main";
+        };
+        rebase = {
+          autosquash = true;
+          autostash = true;
+        };
+        url = {
+          "git@github.com:".pushInsteadOf = "https://github.com/";
+          "git@gitlab.com:".pushInsteadOf = "https://gitlab.com/";
+          "git@guardianproject.dev:".pushInsteadOf = "https://guardianproject.dev/";
+        };
+        user = {
+          name = "irl";
+          email = "iain@learmonth.me";
+        };
+      };
+    };
+  };
+}