[docs] Migrate docs from AsciiDoc to Markdown (#2635)

* delete asciidoc files

* add migrated files

* Apply suggestions from review

Co-authored-by: Josh Mock <josh@joshmock.com>

* Apply suggestions from review

Co-authored-by: Josh Mock <josh@joshmock.com>

* add the new ci checks (#2634)

---------

Co-authored-by: Marci W <333176+marciw@users.noreply.github.com>
Co-authored-by: Josh Mock <josh@joshmock.com>

docs/reference/search_examples.md

@@ -0,0 +1,64 @@
+---
+mapped_pages:
+  - https://www.elastic.co/guide/en/elasticsearch/client/javascript-api/current/search_examples.html
+---
+
+# Search [search_examples]
+
+The `search` API allows you to execute a search query and get back search hits that match the query. The query can either be provided using a simple [query string as a parameter](https://www.elastic.co/docs/api/doc/elasticsearch/operation/operation-search), or using a [request body](https://www.elastic.co/guide/en/elasticsearch/reference/current/search-request-body.html).
+
+```js
+'use strict'
+
+const { Client } = require('@elastic/elasticsearch')
+const client = new Client({
+  cloud: { id: '<cloud-id>' },
+  auth: { apiKey: 'base64EncodedKey' }
+})
+
+async function run () {
+  // Let's start by indexing some data
+  await client.index({
+    index: 'game-of-thrones',
+    document: {
+      character: 'Ned Stark',
+      quote: 'Winter is coming.'
+    }
+  })
+
+  await client.index({
+    index: 'game-of-thrones',
+    document: {
+      character: 'Daenerys Targaryen',
+      quote: 'I am the blood of the dragon.'
+    }
+  })
+
+  await client.index({
+    index: 'game-of-thrones',
+    // here we are forcing an index refresh,
+    // otherwise we will not get any result
+    // in the consequent search
+    refresh: true,
+    document: {
+      character: 'Tyrion Lannister',
+      quote: 'A mind needs books like a sword needs a whetstone.'
+    }
+  })
+
+  // Let's search!
+  const result = await client.search({
+    index: 'game-of-thrones',
+    query: {
+      match: {
+        quote: 'winter'
+      }
+    }
+  })
+
+  console.log(result.hits.hits)
+}
+
+run().catch(console.log)
+```
+