Fix audio collection page SSR error

[obulat]

Extract common functionality to a composable

Fixes

Fixes #4721 by @obulat

Description

This PR fixes the audio collection SSR by setting the media to the media from the store (instead of the empty array).

It also extracts the collection functionality into a composable. This reduces the code duplication between the audio/image collection pages.
Another fix in this PR is the re-addition of the creatorUrl prop. This prop was lost when migrating to Nuxt 3, and the creator collections did not have the link to their landing pages on source websites.

Testing Instructions

Run the app.

Search for something in audio, and then click on one of the tags. Refresh the page to see how SSR page looks. On main and in production, the page does not show any results, and there is an error logged in the console. In this PR, the page works correctly. Note that the image collections work well both in production and here.

Check a creator collection page. On main and in production, the page does not have a creator link button in the header. In this PR, the link is shown (both in the image and in the audio page)

Checklist

• My pull request has a descriptive title (not a vague title likeUpdate index.md).
• My pull request targets the default branch of the repository (main) or a parent feature branch.
• My commit messages follow best practices.
• My code follows the established code style of the repository.
• I added or updated tests for the changes I made (if applicable).
• I added or updated documentation (if applicable).
• I tried running the project locally and verified that there are no visible errors.
• I ran the DAG documentation generator (ov just catalog/generate-docs for catalog
  PRs) or the media properties generator (ov just catalog/generate-docs media-props
  for the catalog or ov just api/generate-docs for the API) where applicable.

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