refactor: moved nixos modules to dendrite pattern

modules/nixos/programs/panoramax/fail2ban.nix

@@ -0,0 +1,13 @@
+{...}: {
+  flake.nixosModules.panoramax-fail2ban = {
+    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
+    };
+  };
+}