Add the Marble and Highlighter templates, completing the 13 Canva templates

Marble uses a flat-to-gradient band in place of the marble photo and bundles Lustria (OFL).
Both logo slots are opt-in. Quirk 13 documents a fontkit glyph-cache issue that the
tests work around with warm-up renders; the engine fix follows separately.

src/pdf/templates/registry.ts

@@ -8,6 +8,8 @@ import { tealSwoosh } from "./band/teal";
 import { citrusSplit } from "./northline/citrus";
 import { purplePop } from "./northline/purple";
 import { cobaltStripe } from "./cobalt/cobalt";
+import { highlighter } from "./highlighter/highlighter";
+import { marble } from "./marble/marble";
 import { monolith } from "./monolith/monolith";
 import { monogram } from "./neutral/monogram";
 import { serenity } from "./neutral/serenity";
@@ -26,6 +28,8 @@ export const TEMPLATES: Record<string, TemplateDefinition> = {
   "citrus-split": citrusSplit,
   monolith,
   "cobalt-stripe": cobaltStripe,
+  marble,
+  highlighter,
 };
 
 export const DEFAULT_TEMPLATE_ID = "classic";