feat(docs): support afterFeatures slot in FrameworkOverview

Adds an optional `afterFeatures` ReactNode prop to the FrameworkOverview
landing-page component, rendered as a section between the supported
features grid and the architecture section. Lets the hosting MDX page
inject contextual content (links, callouts, sign-up cards) below the
final feature without needing to modify the component for each
integration.

Author: samjulien

docs/components/content/landing-pages/framework-overview.tsx

@@ -43,6 +43,8 @@ export interface FrameworkOverviewProps {
   initCommand: string;
   featuresLink: string;
   supportedFeatures?: FrameworkFeature[];
+  /** Optional content rendered immediately after the supported features section. */
+  afterFeatures?: ReactNode;
   architectureImage?: string;
   architectureVideo?: string;
   liveDemos: LiveDemo[];
@@ -61,6 +63,7 @@ export function FrameworkOverview({
   initCommand,
   featuresLink,
   supportedFeatures = [],
+  afterFeatures,
   architectureImage,
   architectureVideo,
   liveDemos,
@@ -271,6 +274,10 @@ export function FrameworkOverview({
           </section>
         )}
 
+        {afterFeatures && (
+          <section className="mb-12 sm:mb-24 px-4">{afterFeatures}</section>
+        )}
+
         {/* Architecture */}
         <section className="mb-12 sm:mb-24">
           <div className="mb-8 sm:mb-12 text-center px-4">