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/internal/apps/admin/updater/restart_windows.go

@@ -0,0 +1,12 @@
+//go:build windows
+
+// Copyright 2026 Arctel.net
+// SPDX-License-Identifier: Apache-2.0
+
+package updater
+
+import "errors"
+
+func replaceAndRestart(_, _ string) error {
+	return errors.New(errAutomaticUpgradeBlocked)
+}