Add Trust Center top bar to compliance portal

Build the Trust Center top navigation in a Relay-wired layout route. The
portal now mounts a Relay environment and provider, and the root layout
loads a query whose fragment feeds the TopBar: brand, ghost-pill nav with
an active state from the router, and a guest "Get Access" button versus an
authenticated user menu. Placeholder section routes keep the nav links and
active state functional until real pages land.

Wire the Relay tagged-template transform via @rolldown/plugin-babel and
set the router basename to the /trust/{slug} path prefix so the app
resolves under its served path.

Signed-off-by: Émile Ré <emile@probo.com>

apps/compliance-portal/src/pages/MainLayoutSkeleton.tsx

@@ -0,0 +1,23 @@
+// Copyright (c) 2026 Probo Inc <hello@probo.com>.
+//
+// Permission to use, copy, modify, and/or distribute this software for any
+// purpose with or without fee is hereby granted, provided that the above
+// copyright notice and this permission notice appear in all copies.
+//
+// THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
+// REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
+// AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
+// INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
+// LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
+// OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+// PERFORMANCE OF THIS SOFTWARE.
+
+import { TopBarSkeleton } from "#/components/TopBar/TopBarSkeleton";
+
+export function MainLayoutSkeleton() {
+  return (
+    <div className="min-h-screen bg-sand-1">
+      <TopBarSkeleton />
+    </div>
+  );
+}