refactor: split server modules into smaller more manageable files

modules/nixos-modules/server/panoramax/fail2ban.nix

@@ -0,0 +1,11 @@
+{
+  lib,
+  config,
+  ...
+}: {
+  config = lib.mkIf (config.services.panoramax.enable && config.services.fail2ban.enable) {
+    # TODO: configure options for fail2ban
+    # This is a placeholder - panoramax fail2ban configuration would need to be defined
+    # based on the specific log patterns and security requirements
+  };
+}