Initial dendritic rewrite

modules/hosts/host.nix

@@ -0,0 +1,17 @@
+{
+  flake.modules.nixos.host =
+    { lib, ... }:
+    {
+      # ? Could potentially move this directly into the agenix module
+      options = {
+        # Host public SSH key (e.g. /etc/ssh/ssh_host_ed25519_key.pub).
+        # We only set the hostPubkey if one is supplied. For new hosts the pub key will not
+        # exist until it is generated after the first rebuild.
+        hostPubkey = lib.mkOption {
+          type = lib.types.nullOr lib.types.str;
+          default = null;
+          description = "The public key of the host. Will be null until generated on first rebuild";
+        };
+      };
+    };
+}