Add 404 if component is not found in search

[taroj1205]

Subject

404

Description

We should show a 404 if search result is not found.
Also fix the error below when switching between languages.

⨯ pages/search/index.page.tsx (39:18) @ some
 ⨯ TypeError: Cannot read properties of undefined (reading 'some')
    at eval (webpack-internal:///./pages/search/index.page.tsx:34:23)
    at Array.filter (<anonymous>)
    at getServerSideProps (webpack-internal:///./pages/search/index.page.tsx:32:27) {
  page: '/search'
}
  37 |     if (content.type !== "component") return false
  38 |
> 39 |     return labels.some((label) => (content.labels as string[])?.includes(label))
     |                  ^
  40 |   })
  41 |
  42 |   const components = (

Are you willing to participate in the development of this feature and create a pull request?

None