Added doc examples (#1011)

* Added generate-docs-examples script

* Added doc_examples folder wth the initial examples

docs/doc_examples/60ee33f3acfdd0fe6f288ac77312c780.asciidoc

@@ -0,0 +1,21 @@
+// This file is autogenerated, DO NOT EDIT
+// Use `node scripts/generate-docs-examples.js` to generate the docs examples
+
+[source, js]
+----
+const response = await client.search({
+  body: {
+    query: {
+      query_string: {
+        fields: [
+          'title'
+        ],
+        query: 'this that thus',
+        minimum_should_match: 2
+      }
+    }
+  }
+})
+console.log(response)
+----
+