Implement r5500 media stack configuration with NFS and Docker services

- Added configuration for media stack on r5500, including paths for Jellyfin, Sonarr, Radarr, and other media services.
- Integrated NFS client for accessing Jellyfin libraries from nixdesk.
- Established Docker services for Dispatcharr and Organizr, including necessary user and group setups.
- Created systemd services for managing media directories and ensuring proper permissions.

modules/hosts/r5500/_services/organizr.nix

@@ -0,0 +1,48 @@
+{ lib, pkgs, mediaStackPaths, ... }:
+let
+  configDir = mediaStackPaths.organizrDataDir;
+in
+{
+  users.groups.organizr = { gid = 950; };
+  users.users.organizr = {
+    isSystemUser = true;
+    uid = 950;
+    group = "organizr";
+  };
+
+  systemd.tmpfiles.settings."r5500-organizr-config" = {
+    "${configDir}"."d" = {
+      mode = "0755";
+      user = "organizr";
+      group = "organizr";
+    };
+  };
+
+  systemd.tmpfiles.settings."r5500-organizr-config-perms" = {
+    "${configDir}"."Z" = {
+      mode = "0755";
+      user = "organizr";
+      group = "organizr";
+    };
+  };
+
+  systemd.services.docker-organizr.preStart = lib.mkBefore ''
+    ${pkgs.coreutils}/bin/mkdir -p ${configDir}
+    ${pkgs.coreutils}/bin/chown -R organizr:organizr ${configDir}
+  '';
+
+  virtualisation.oci-containers.containers.organizr = {
+    image = "ghcr.io/organizr/organizr:latest";
+    ports = [ "8888:80" ];
+    volumes = [
+      "${configDir}:/config"
+    ];
+    environment = {
+      PUID = "950";
+      PGID = "950";
+      TZ = "America/Moncton";
+    };
+  };
+
+  networking.firewall.allowedTCPPorts = [ 8888 ];
+}