Add state-version option

nixosModules/clanCore/state-version/tests/flake-module.nix

@@ -0,0 +1,38 @@
+{ ... }:
+{
+  perSystem =
+    { ... }:
+    {
+      clan.nixosTests.state-version = {
+
+        name = "state-version";
+
+        clan = {
+          directory = ./.;
+
+          # Workaround until we can use nodes.server = { };
+          modules."@clan/importer" = ../../../../clanServices/importer;
+
+          inventory = {
+            machines.server = { };
+            instances.importer = {
+              module.name = "@clan/importer";
+              roles.default.tags.all = { };
+              roles.default.extraModules = [
+                {
+                  clan.core.settings.state-version.enable = true;
+                }
+              ];
+            };
+          };
+        };
+
+        # TODO: Broken. Use instead of importer after fixing.
+        # nodes.server = { };
+
+        # This is not an actual vm test, this is a workaround to
+        # generate the needed vars for the eval test.
+        testScript = "";
+      };
+    };
+}