feat: add DevHub section and update heading styles across components

src/components/Features.tsx

@@ -8,6 +8,7 @@ export function Features() {
   return (
     <section id="features" className=" py-24">
       <div className="mx-auto max-w-2xl px-6 lg:max-w-7xl lg:px-8">
+        <h2 className="text-base/7 font-semibold text-cyan-500">Core Components</h2>
         <p className="mt-2 max-w-4xl text-3xl lg:text-4xl font-medium tracking-tight  text-pretty text-gray-950">
           Network Capabilities
         </p>