[Component Library] Add a page for the Search component

From <~gwalt>: we should add it to the template, it would make sense to have that present on all pages… But creating a detail page for it should also be possible with an example of it.

No files or tests are named. Start by locating the component library template and existing component detail pages, then compare how other components are represented. Done means the Search component appears in the template and has a detail page containing an example.

Written by the indexing model from the issue text.