Add hosted synthetic control plane

apps/web/app/api/admin/synthetic/control/route.ts

@@ -0,0 +1,19 @@
+import { proxySyntheticAdminRequest } from "../shared";
+
+export const dynamic = "force-dynamic";
+
+export async function GET(): Promise<Response> {
+  return proxySyntheticAdminRequest("/admin/synthetic/control", {
+    method: "GET"
+  });
+}
+
+export async function PUT(req: Request): Promise<Response> {
+  return proxySyntheticAdminRequest(
+    "/admin/synthetic/control",
+    {
+      method: "PUT",
+      body: await req.text()
+    }
+  );
+}