Add the Monolith and Cobalt Stripe templates

Standalone layouts for Canva templates 3 and 8, with the user's logo sized to the
placeholder box, a CapRule decor primitive, optional TableRows rule/heading options,
and a separate 1..45-row sweep test file.

src/pdf/templates/registry.ts

@@ -7,6 +7,8 @@ import { slateBand } from "./band/slate";
 import { tealSwoosh } from "./band/teal";
 import { citrusSplit } from "./northline/citrus";
 import { purplePop } from "./northline/purple";
+import { cobaltStripe } from "./cobalt/cobalt";
+import { monolith } from "./monolith/monolith";
 import { monogram } from "./neutral/monogram";
 import { serenity } from "./neutral/serenity";
 
@@ -22,6 +24,8 @@ export const TEMPLATES: Record<string, TemplateDefinition> = {
   "teal-swoosh": tealSwoosh,
   "purple-pop": purplePop,
   "citrus-split": citrusSplit,
+  monolith,
+  "cobalt-stripe": cobaltStripe,
 };
 
 export const DEFAULT_TEMPLATE_ID = "classic";