chore: Remove favicon and enhance global styles

- Delete unused favicon.ico file to clean up project assets
- Add smooth scrolling behavior to html element for improved user experience
- Refactor box-shadow property in Toastify styles for better readability
- Update button states in Contact Us and Inquiries forms to include hcaptchaToken validation

app/_contact-us/form.tsx

@@ -132,7 +132,7 @@ const ContactUsForm = ({
       <div className={`${colSpanClass} flex justify-end`}>
         <button
           type="submit"
-          disabled={!isValid || isLoading}
+          disabled={!isValid || isLoading || !hcaptchaToken}
           className="bg-(--primary) cursor-pointer w-fit text-white rounded-full py-4 px-6 flex justify-center items-center text-center disabled:opacity-60 disabled:cursor-not-allowed">
           {isLoading ? <Loading /> : buttonText}
         </button>