fix(graphql): add query timeout argument when create client.

# Conflicts:
#	packages/graphql/lib/src/core/query_manager.dart
#	packages/graphql/lib/src/graphql_client.dart

Author: ykuc7

packages/graphql/lib/src/core/query_manager.dart

@@ -35,6 +35,7 @@ class QueryManager {
     this.alwaysRebroadcast = false,
     DeepEqualsFn? deepEquals,
     bool deduplicatePollers = false,
+    this.requestTimeout = const Duration(seconds: 5),
   }) {
     scheduler = QueryScheduler(
       queryManager: this,
@@ -51,6 +52,9 @@ class QueryManager {
   /// Whether to skip deep equality checks in [maybeRebroadcastQueries]
   final bool alwaysRebroadcast;
 
+  /// The timeout for resolving a query
+  final Duration requestTimeout;
+
   QueryScheduler? scheduler;
   static final _oneOffOpId = '0';
   int idCounter = 1;
@@ -256,8 +260,7 @@ class QueryManager {
 
     try {
       // execute the request through the provided link(s)
-      response =
-          await link.request(request).timeout(Duration(seconds: 5)).first;
+      response = await link.request(request).timeout(this.requestTimeout).first;
 
       queryResult = mapFetchResultToQueryResult(
         response,

packages/graphql/lib/src/graphql_client.dart

@@ -28,13 +28,15 @@ class GraphQLClient implements GraphQLDataProxy {
     bool alwaysRebroadcast = false,
     DeepEqualsFn? deepEquals,
     bool deduplicatePollers = false,
+    Duration queryRequestTimeout = const Duration(seconds: 5),
   })  : defaultPolicies = defaultPolicies ?? DefaultPolicies(),
         queryManager = QueryManager(
           link: link,
           cache: cache,
           alwaysRebroadcast: alwaysRebroadcast,
           deepEquals: deepEquals,
           deduplicatePollers: deduplicatePollers,
+          requestTimeout: queryRequestTimeout,
         );
 
   /// The default [Policies] to set for each client action