seo: implement OpenAPI operation rendering and add llms documentation

apps/landing/src/content/markdown-slugs.ts

@@ -0,0 +1,14 @@
+export const MARKDOWN_SLUGS: ReadonlySet<string> = new Set([
+  'index',
+  'pricing',
+  'features/workflows',
+  'features/segments',
+  'features/inbound-email',
+  'features/email-editor',
+  'features/smtp',
+]);
+
+export function hasMarkdownVariant(pathname: string): boolean {
+  const slug = pathname.replace(/^\/+|\/+$/g, '') || 'index';
+  return MARKDOWN_SLUGS.has(slug);
+}

apps/landing/src/content/pages.ts

@@ -341,3 +341,5 @@ Plunk provides SMTP credentials so you can send emails from any application or f
 [Back to features](/features) | [Pricing](/pricing) | [Documentation](https://docs.useplunk.com)
 `,
 };
+
+export {MARKDOWN_SLUGS, hasMarkdownVariant} from './markdown-slugs';