feat(wireframe): support search input and search results panel

[glenstaes]

Often, in applications, there is a global search box, that presents the user with a list of search results across the application's managed entities.

It should be possible to:

• Enable the search input, which is shown in the sidenav, below the projected content and above the navigation items.
• Specify a label for the search input.
• Hook into the debounced event of search input changes.
• Project search results in a second sidenav, on top of the page content and toolbar.