feat: redesign homepage and early access page

This commit introduces a comprehensive redesign of the homepage and refactors the "Contact Us" page into a dedicated "Get Early Access" page.

Key changes include:
- **Homepage:** A complete overhaul with new sections, including a hero, feature highlights, and a problem/solution section to better communicate the product's value proposition.
- **Early Access Page:** The former "Contact Us" page is now repurposed for early access sign-ups, with updated copy and a more focused call-to-action.
- **Component Refactoring:**
    - The `InputGroup` component has been extracted from the form into a reusable component (`app/_components/InputGroup.tsx`) for better modularity.
    - The `CenterFrame` component has been updated to support images and new props (`src`, `title`, `alt`) to fit the new homepage design.
- **Layout Improvements:** The early access form now uses a two-column grid layout on larger screens for improved user experience.

app/contact-us/page.tsx

@@ -2,25 +2,8 @@ import ContactUsForm from "./form";
 
 const ContactUs = () => {
   return (
-    <div className="flex flex-col items-center mt-20">
-      <div className="flex flex-col items-center mb-16">
-        <h6 className="text-lg w-fit font-semibold text-(--primary) bg-(--primary)/20 opacity-80 p-2 rounded-full">
-          Contact Us
-        </h6>
-
-        <h1 className="font-extrabold my-6 text-4xl">Let's get in touch</h1>
-        <div className=" text-center block md:flex gap-1">
-          <p className="font-extralight text-xl">
-            Or just reach out manually to
-          </p>
-          <a
-            href="mailto:info@opples.com"
-            className="text-(--primary) font-extralight text-xl">
-            info@opplens.com
-          </a>
-        </div>
-      </div>
-      <section className="border border-gray-300 rounded-4xl w-10/12 flex flex-col items-center">
+    <div className="flex flex-col items-center mt-20 px-4">
+      <section className="border border-gray-300 rounded-4xl w-full max-w-4xl flex flex-col items-center bg-white">
         <ContactUsForm />
       </section>
     </div>