refactor(repo): replace legacy openflare-server with Wavelet rename

Delete the old monolithic openflare-server implementation and rename
Wavelet/ to openflare-server/ to complete the migration consolidation.
Update CI workflows, agent Dockerfiles, and deployment docs for the new
layout (frontend/, docker/Dockerfile).

openflare-server/frontend/app/(main)/admin/layout.tsx

@@ -0,0 +1,18 @@
+"use client"
+
+import {AdminUsersProvider} from "@/contexts/admin-users-context"
+import {RequireAdminAuth} from "@/components/auth/require-auth"
+
+export default function AdminLayout({
+  children,
+}: {
+  children: React.ReactNode
+}) {
+  return (
+    <RequireAdminAuth>
+      <AdminUsersProvider>
+        {children}
+      </AdminUsersProvider>
+    </RequireAdminAuth>
+  )
+}