Add missing snippets (#2113)

For https://github.com/elastic/clients-team/issues/728

docs/doc_examples/36b86b97feedcf5632824eefc251d6ed.asciidoc

@@ -0,0 +1,12 @@
+[source,js]
+----
+const response = await client.search({
+  index: 'books',
+  query: {
+    match: {
+      name: 'brave'
+    }
+  }
+})
+console.log(response)
+----

docs/doc_examples/8575c966b004fb124c7afd6bb5827b50.asciidoc

@@ -0,0 +1,13 @@
+[source,js]
+----
+const response = await client.index({
+  index: 'books',
+  document: {
+    name: 'Snow Crash',
+    author: 'Neal Stephenson',
+    release_date: '1992-06-01',
+    page_count: 470,
+  }
+})
+console.log(response)
+----

docs/doc_examples/bcc75fc01b45e482638c65b8fbdf09fa.asciidoc

@@ -0,0 +1,7 @@
+[source,js]
+----
+const response = await client.search({
+  index: 'books'
+})
+console.log(response)
+----

docs/doc_examples/d04f0c8c44e8b4fb55f2e7d9d05977e7.asciidoc

@@ -0,0 +1,43 @@
+[source,js]
+----
+const response = await client.bulk({
+  operations: [
+    { index: { _index: 'books' } },
+    {
+      name: 'Revelation Space',
+      author: 'Alastair Reynolds',
+      release_date: '2000-03-15',
+      page_count: 585,
+    },
+    { index: { _index: 'books' } },
+    {
+      name: '1984',
+      author: 'George Orwell',
+      release_date: '1985-06-01',
+      page_count: 328,
+    },
+    { index: { _index: 'books' } },
+    {
+      name: 'Fahrenheit 451',
+      author: 'Ray Bradbury',
+      release_date: '1953-10-15',
+      page_count: 227,
+    },
+    { index: { _index: 'books' } },
+    {
+      name: 'Brave New World',
+      author: 'Aldous Huxley',
+      release_date: '1932-06-01',
+      page_count: 268,
+    },
+    { index: { _index: 'books' } },
+    {
+      name: 'The Handmaids Tale',
+      author: 'Margaret Atwood',
+      release_date: '1985-06-01',
+      page_count: 311,
+    }
+  ]
+})
+console.log(response)
+----