refactor: restructure topology

hosts/sentinel/default.nix

@@ -13,6 +13,7 @@
   ];
 
   boot.mode = "bios";
+
   users.groups.acme.members = ["nginx"];
   services.nginx.enable = true;
   services.nginx.recommendedSetup = true;

topology/default.nix

@@ -1 +1,2 @@
-import ./render.nix
+{renderer ? "d2", ...} @ attrs:
+import ./renderers/${renderer} attrs

topology/renderers/d2/default.nix

@@ -0,0 +1,5 @@
+{pkgs, ...} @ attrs:
+pkgs.runCommand "build-d2-topology" {} ''
+  mkdir -p $out
+  cp ${import ./network.nix attrs} $out/network.d2
+''

topology/renderers/d2/network.nix

@@ -1,8 +1,7 @@
 {
   pkgs,
-  # deadnix: skip
-  renderer ? "graphviz",
   nixosConfigurations,
+  ...
 }: let
   inherit
     (pkgs.lib)