feat: Refactor contact form and improve 404 page

This commit refactors the contact form for better reusability and moves it from the global footer to a dedicated section on the homepage. Additionally, it enhances the user experience on the 404 page.

Key changes:
- The `ContactUsForm` component is now configurable with props for grid layout (`columnsPerRow`) and button text, making it more versatile.
- The contact form has been removed from the shared footer in the main layout and is now explicitly included only on the homepage.
- The 404 "Not Found" page has been updated to include a direct link to the homepage for easier navigation.
- Minor style adjustments were made to the 404 page layout and input field padding for improved visual consistency.

app/_components/FooterForm.tsx

@@ -1,10 +1,6 @@
-"use client";
-import { usePathname } from "next/navigation";
 import ContactUs from "../_contact-us/page";
 
 const FooterForm = () => {
-  const pathName = usePathname();
-  if (pathName !== "/") return null;
   return (
     <div className="absolute w-full -top-[420px] md:-top-72 z-10">
       <ContactUs />