Create a page for tag/creator/source views

[obulat]

Problem

We need a new page for the Additional search views projects. We should handle the following paths:
/pages/_mediaType/tag/_tag
/pages/_mediaType/source/_source
/pages/_mediaType/source/_source/creator/_creator (this page might not be needed as it might be handled by the source page)

Description

To make sure that the mediaType, source and creator parameters are valid, this page should use the validate method to make sure that and show an error page if necessary.

function validate({ params, $pinia }): boolean {
  const { collection, mediaType, term } = params
  // Check that collection is one of ["tag", "creator" or "source"],
  // and mediaType is one of `supportedMediaTypes`.
  // Check that `term` is correctly escaped.
  // If the params are not valid, return `false` to show the error page.
  return isValid ? true : false
}

This page should also update the state (searchType, searchTerm and searchBy and provider filters) in the search store and handle fetching using mediaStore’s fetchMedia method in the useFetch hook.

Since it is not possible to change the path or query parameters from this page client-side, fetching can be much simpler than on the current search page (that has to watch for changes in the route and fetch if necessary).

This page should use VCollectionHeader and the image grid or the audio collection.

Dependencies

Issue is blocked on the following dependencies:

• Extract VAudioCollection component #2694
• Component: VCollectionHeader #2729
• Update the Nuxt store to allow for searches by source/creator/tag #2858

[sarayourfriend]

See #2734 (comment) for a discussion about the sub-heading complexity and potential alternative formats that avoid translation issues.