refactor(host/orion): improve virtualisation setup

hosts/orion/modules/services/docker.nix

@@ -1,21 +0,0 @@
-{ pkgs, ... }:
-{
-  environment.systemPackages = with pkgs; [
-    docker
-    docker-compose
-  ];
-
-  virtualisation = {
-    oci-containers.backend = "docker";
-    containers.enable = true;
-    docker = {
-      enable = true;
-      rootless = {
-        enable = true;
-        setSocketVariable = true;
-      };
-      autoPrune.enable = true;
-      package = pkgs.docker;
-    };
-  };
-}

hosts/orion/modules/users.nix

@@ -16,6 +16,7 @@
         "wheel"
         "keyd"
         (lib.mkIf config.virtualisation.docker.enable "docker")
+        (lib.mkIf config.virtualisation.libvirtd.enable "libvirtd")
       ];
       group = "price";
       shell = pkgs.zsh;

hosts/orion/modules/virtualisation.nix

@@ -0,0 +1,16 @@
+{ pkgs, ... }:
+{
+  environment.systemPackages = with pkgs; [ docker-compose ];
+
+  programs.virt-manager.enable = true;
+  virtualisation = {
+    libvirtd.enable = true;
+    containers.enable = true;
+    podman = {
+      enable = true;
+      dockerCompat = true;
+      defaultNetwork.settings.dns_enabled = true;
+      autoPrune.enable = true;
+    };
+  };
+}