extract out gpg-agent service

home/services/default.nix

@@ -1,6 +1,7 @@
 { ... }: {
   services = {
     imports = [
+      ./gpg-agent.nix
       ./spotifyd.nix
     ];
     blueman-applet.enable = true;

home/services/gpg-agent.nix

@@ -0,0 +1,9 @@
+{ ... }: {
+  gpg-agent = {
+    enable = true;
+    enableExtraSocket = true;
+    enableScDaemon = true;
+    enableSshSupport = true;
+    pinentryFlavor = "gnome3";
+  };
+}