refactor: added flake parts

modules/hosts/home/git/default.nix

@@ -0,0 +1,24 @@
+{...}: {
+  flake.homeModules.gitConfiguration = {osConfig, ...}: {
+    impermanence.fallbackPersistence.enable = false;
+
+    home = {
+      username = osConfig.users.users.git.name;
+      homeDirectory = osConfig.users.users.git.home;
+
+      # This value determines the Home Manager release that your configuration is
+      # compatible with. This helps avoid breakage when a new Home Manager release
+      # introduces backwards incompatible changes.
+      #
+      # You should not change this value, even if you update Home Manager. If you do
+      # want to update the value, then make sure to first check the Home Manager
+      # release notes.
+      stateVersion = "23.11"; # Please read the comment before changing.
+    };
+
+    programs.ssh.extraConfig = ''
+      AuthorizedKeysFile
+      /var/lib/forgejo/.ssh/authorized_keys
+    '';
+  };
+}