add isServer protobuf to engine api

proto/decentraland/kernel/apis/engine_api.proto

@@ -2,6 +2,7 @@ syntax = "proto3";
 
 package decentraland.kernel.apis;
 
+import "google/protobuf/empty.proto";
 import "decentraland/sdk/ecs6/engine_interface_ecs6.proto";
 
 message ManyEntityAction {
@@ -88,6 +89,10 @@ message CrdtMessageFromRendererResponse {
   repeated bytes data = 1;
 }
 
+message IsServerResponse {
+  bool is_server = 1;
+}
+
 service EngineApiService {
   // support for legacy SDK events.
 
@@ -104,7 +109,7 @@ service EngineApiService {
 
   // TBD: name
   rpc CrdtSendNetwork(CrdtSendToRendererRequest) returns (CrdtSendToResponse) {}
-
+  rpc IsServer(google.protobuf.Empty) returns (IsServerResponse) {}
   // retrieves the current _full_ state of the entities from the renderer. This function is used to hidrate
   // the state of the scenes when the code of the worker is stopped/resumed
   rpc CrdtGetState(CrdtSendToRendererRequest) returns (CrdtGetStateResponse) {}