[SiriusA] Adds configuration. [MCP] Cleans up config file.

system/hosts/sirius-a/drew.nix

@@ -0,0 +1,26 @@
+{ ... }:
+{
+  imports = map (x: ../../../home-manager + x) [
+    "/features/development/development.nix"
+  ];
+
+  # This config file is needed for nix shell to allow unfree programs.  I'm not
+  # sure why this isn't a home-manager option.
+  home = {
+    file.".config/nixpkgs/config.nix".text = ''
+      { allowUnfree = true; }
+    '';
+
+    stateVersion = "24.11";
+
+    username = "drew";
+    homeDirectory = "/home/drew";
+  };
+
+  programs.git.settings = {
+    user = {
+      name = "Drew Haven";
+      email = "periodic@blazestar.net";
+    };
+  };
+}