Update to search description

[ofermend]

Making the "search_description" be a Markdown component to support a need in one demo to include LINK in that description.

[cjcenizal]

Markdown will enable elements here that don't belong, such as lists, tables, and multiple paragraphs. This seems like overkill for the stated problem.

I think a more targeted solution would be to add a searchHeader.descriptionUrl option. Then this code would conditionally render a link if that option is defined. What do you think of this approach?

const searchHeaderDescription = searchHeader.description.replaceAll("\\n", "\n");

const searchHeaderContent = searchHeader.descriptionUrl ? (
  <a href={searchHeader.descriptionUrl}>{searchHeaderDescription}</a>
) : searchHeaderDescription;

return (
  <VuiTextColor color="subdued">
    <h2 style={{ whiteSpace: "pre-line" }}>
      {searchHeaderContent}
    </h2>
  </VuiTextColor>
);

[ofermend]

So in this way the whole description is a single URL right?
In this case, the idea was to have something like "Created by Bob Gourley (OODA)" where only OODA is a URL linking to Bob's website. Any good way to do that?
I think Markdown can also be useful to do multi-line descriptions that we want to control the line breaks e.g. with

[cjcenizal]

I think I'd probably make the whole thing a link or I'd add a location in the UI for rendering some kind of authorship link. I'll approve this PR to unblock you though.