feat(layout): add full-height flex layout and FullWidth component

src/components/layout/FullWidth.tsx

@@ -0,0 +1,13 @@
+import { css, cx } from '@styled-system/css'
+import type { FC, ReactNode } from 'react'
+
+export interface FullWidthProps {
+  className?: string
+  children?: ReactNode
+}
+
+const FullWidth: FC<FullWidthProps> = ({ className, children }) => {
+  return <main className={cx(css({ flexGrow: 1 }), className)}>{children}</main>
+}
+
+export default FullWidth