fix: correct SkillsMP marketplace API response mapping for Docker instances (#988)

src/app/api/skills/marketplace/route.ts

@@ -33,7 +33,7 @@ export async function GET(request: Request) {
     }
 
     const data = await res.json();
-    return NextResponse.json({ skills: data.skills || [] });
+    return NextResponse.json({ skills: data.data?.skills || data.skills || [] });
   } catch (err: unknown) {
     const error = err instanceof Error ? err.message : String(err);
     return NextResponse.json({ error }, { status: 500 });