move templates

templates/mergeTemplateOptions.nix

@@ -0,0 +1,21 @@
+# Flake module that declares flake.templates outputs and how to merge it
+{
+  lib,
+  flake-parts-lib,
+  ...
+}: let
+  inherit (lib) mkOption types;
+  inherit (flake-parts-lib) mkSubmoduleOptions;
+in {
+  options = {
+    flake = mkSubmoduleOptions {
+      templates = mkOption {
+        type = types.lazyAttrsOf types.unspecified;
+        default = {};
+        description = ''
+          Templates that will be put in the self flake.
+        '';
+      };
+    };
+  };
+}