Exclude the icon gallery route from prerendering

Author: milanofthe

src/routes/icons/+page.ts

@@ -0,0 +1,5 @@
+// Internal design aid, not part of the shipped site: opt out of the
+// prerendering the root layout switches on, so the build doesn't fail
+// looking for a route nothing links to. Still reachable via the SPA
+// fallback when someone types the URL.
+export const prerender = false;