feat: split flake into multiple hosts and add homelab config

hosts/lithium/services/jellyfin.nix

@@ -0,0 +1,20 @@
+{ config, pkgs, ... }:
+let
+  svcDomain = "tv.${config.networking.domain}";
+in
+{
+  services.caddy.virtualHosts."${svcDomain}".extraConfig = ''
+    reverse_proxy :8096
+  '';
+  services.jellyfin = {
+    enable = true;
+    # NOTE: Keeping this open for now, for internal network use.
+    # ports 8096 for http and 8920 for https
+    openFirewall = true;
+  };
+  environment.systemPackages = [
+    pkgs.jellyfin
+    pkgs.jellyfin-web
+    pkgs.jellyfin-ffmpeg
+  ];
+}