Added helpers in doc

Author: ezimuel

docs/helpers.asciidoc

@@ -22,7 +22,7 @@ An example as follows:
 
 [source,php]
 ----
-use Elasticsearch\Helper\Iterators\SearchResponseIterator;
+use Elastic\Elasticsearch\Helper\Iterators\SearchResponseIterator;
 
 $search_params = [
     'scroll'      => '5m', // period to retain the search context
@@ -58,8 +58,8 @@ An example as follows:
 
 [source,php]
 ----
-use Elasticsearch\Helper\Iterators\SearchHitIterator;
-use Elasticsearch\Helper\Iterators\SearchResponseIterator;
+use Elastic\Elasticsearch\Helper\Iterators\SearchHitIterator;
+use Elastic\Elasticsearch\Helper\Iterators\SearchResponseIterator;
 
 $search_params = [
     'scroll'      => '5m', // period to retain the search context

docs/index-custom-title-page.html

@@ -132,6 +132,9 @@ <h4 class="mt-3">
       </h4>
     </div>
     <ul class="ul-col-md-2 ul-col-1">
+      <li>
+        <a href="client-helpers.html">Client helpers</a>
+      </li>
       <li>
         <a href="release-notes.html">Release notes</a>
       </li>

docs/index.asciidoc

@@ -18,6 +18,8 @@ include::configuration.asciidoc[]
 
 include::operations.asciidoc[]
 
+include::helpers.asciidoc[]
+
 include::release-notes.asciidoc[]
 
 include::redirects.asciidoc[]