switched to flakes and built out modularity

modules/services/jellyfin.nix

@@ -0,0 +1,12 @@
+{ config, lib, ... }:
+
+let
+  cfg = config.control.jellyfin;
+in
+{
+  config = lib.mkIf cfg.enable {
+    services.jellyfin.enable = true;
+
+    networking.firewall.allowedTCPPorts = [ 8096 ];
+  };
+}