Add home-manager config for sonja from ~/.config/home-manager

Moves home-manager configuration into the flake under home/sonja/,
integrating git, GPG agent, and package config. Fixes deprecated
home-manager options and removes nixpkgs.config override incompatible
with useGlobalPkgs.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

home/sonja/gpg-agent.nix

@@ -0,0 +1,53 @@
+{ config, lib, pkgs, ... }:
+let
+  cfg = config.custom.pgp;
+in {
+  options.custom.pgp.enable = lib.mkEnableOption "Enable PGP Gnupgp";
+
+  config = lib.mkIf cfg.enable {
+    # 1. Provide the bridge to pcscd
+    home.file.".gnupg/scdaemon.conf".text = ''
+      disable-ccid
+      pcsc-driver ${pkgs.pcsclite.lib}/lib/libpcsclite.so.1
+    '';
+
+    # 2. Configure the Agent
+    services.gpg-agent = {
+      enable = true;
+      enableSshSupport = true;
+      enableZshIntegration = true;
+      pinentry.package = pkgs.pinentry-curses;
+
+      # Removed 'disable-scdaemon' so it can actually talk to our config above
+      extraConfig = ''
+        allow-loopback-pinentry
+      '';
+    };
+
+    # 3. Standard GPG settings
+    programs.gpg = {
+      enable = true;
+      settings = {
+        use-agent = true;
+        personal-cipher-preferences = "AES256 AES192 AES";
+        personal-digest-preferences = "SHA512 SHA384 SHA256";
+        cert-digest-algo = "SHA512";
+        s2k-digest-algo = "SHA512";
+        s2k-cipher-algo = "AES256";
+        charset = "utf-8";
+        fixed-list-mode = "";
+        no-comments = "";
+        no-emit-version = "";
+        no-greeting = "";
+        keyid-format = "0xlong";
+        list-options = "show-uid-validity";
+        verify-options = "show-uid-validity";
+        with-fingerprint = "";
+        require-cross-certification = "";
+        no-symkey-cache = "";
+      };
+    };
+
+    home.packages = [ pkgs.gnupg pkgs.pcsclite ];
+  };
+}