feat: add Header component to FullWidth layout

src/components/layout/FullWidth.tsx

@@ -1,6 +1,7 @@
 import { css, cx } from '@styled-system/css'
 import type { FC, ReactNode } from 'react'
 import Footer from '@/components/layout/fragments/Footer'
+import Header from '@/components/layout/fragments/Header'
 
 export interface FullWidthProps {
   className?: string
@@ -10,6 +11,7 @@ export interface FullWidthProps {
 const FullWidth: FC<FullWidthProps> = ({ className, children }) => {
   return (
     <>
+      <Header />
       <main className={cx(css({ flexGrow: 1 }), className)}>{children}</main>
       <Footer />
     </>