Setup CCID driver bundle directory and add ccid to udev packages

nixos/modules/yubikey.nix

@@ -11,10 +11,18 @@
   services.udev.packages = with pkgs; [
     yubikey-personalization
     libu2f-host
+    ccid
   ];
 
   # CCID driver for smartcard access (required for YubiKey CCID functionality)
-  services.pcscd.plugins = [ pkgs.ccid ];
+  # Set up the PC/SC drivers directory with CCID driver bundle
+  system.activationScripts.pcscdSetup = ''
+    mkdir -p /var/lib/pcsc/drivers/ccid.bundle
+    # Try to symlink CCID bundle files if they exist
+    if [ -d "${pkgs.ccid}/lib/pcsc/drivers/ccid.bundle" ]; then
+      ln -sf "${pkgs.ccid}/lib/pcsc/drivers/ccid.bundle"/* /var/lib/pcsc/drivers/ccid.bundle/ 2>/dev/null || true
+    fi
+  '';
 
   # YubiKey management tools
   environment.systemPackages = with pkgs; [