feat(search): keyboard-accessible search button (#1331)

Andrew

2024-08-10 3b5ed813f5853b13711fb92f86648cb85e8d8f18

 quartz/styles/variables.scss

@@ -5,4 +5,5 @@
$topSpacing: 6rem;
$fullPageWidth: $pageWidth + 2 * $sidePanelWidth;
$boldWeight: 700;
$semiBoldWeight: 600;
$normalWeight: 400;