Refactor(build-clan): rename to lib/modules

This is a preparation for moving everything into clan, to make it all one module evaluation

lib/modules/machineModules/forName.nix

@@ -0,0 +1,29 @@
+{
+  name,
+  directory,
+  meta,
+}:
+{
+  _class,
+  lib,
+  ...
+}:
+{
+  imports = builtins.filter builtins.pathExists (
+    [
+      "${directory}/machines/${name}/configuration.nix"
+    ]
+    ++ lib.optionals (_class == "nixos") [
+      "${directory}/machines/${name}/hardware-configuration.nix"
+      "${directory}/machines/${name}/disko.nix"
+    ]
+  );
+
+  clan.core.settings = {
+    inherit (meta) name icon;
+    inherit directory;
+    machine = {
+      inherit name;
+    };
+  };
+}

lib/modules/machineModules/overridePkgs.nix

@@ -0,0 +1,17 @@
+{
+  pkgs,
+}:
+{
+  lib,
+  ...
+}:
+{
+  imports = [
+    ({
+      # For vars we need to ensure that the system so we run vars generate on
+      # is in sync with the pkgs of the system
+      nixpkgs.hostPlatform = lib.mkForce pkgs.system;
+      nixpkgs.pkgs = lib.mkForce pkgs;
+    })
+  ];
+}