feat: Waku v2 bridge

Issue #12610

vendor/github.com/golang/groupcache/groupcachepb/groupcache.proto

@@ -0,0 +1,34 @@
+/*
+Copyright 2012 Google Inc.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+     http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+syntax = "proto2";
+
+package groupcachepb;
+
+message GetRequest {
+  required string group = 1;
+  required string key = 2; // not actually required/guaranteed to be UTF-8
+}
+
+message GetResponse {
+  optional bytes value = 1;
+  optional double minute_qps = 2;
+}
+
+service GroupCache {
+  rpc Get(GetRequest) returns (GetResponse) {
+  };
+}