Use visibility field instead of noMatch and add docs

Author: richbenwell

plugins/OpenSearch/v1/README.md

@@ -1,6 +1,6 @@
 ## Overview
 
-Query OpenSearch databases. This plugin is primarily a wrapper around the `_search` API endpoint that allows for a range of queries.
+Query OpenSearch databases using DSL. This plugin is primarily a wrapper around the `_search` API endpoint that allows for a range of queries.
 
 See the [OpenSearch API docs](https://docs.opensearch.org/latest/api-reference/search-apis/search/) for more information.
 

plugins/OpenSearch/v1/dataStreams/indices.json

@@ -14,8 +14,8 @@
     },
     "timeframes": false,
     "matches": "none",
-    "options": {
-        "noMatch": true
+    "visibility": {
+        "type": "hidden"
     },
     "metadata": [
         {

plugins/OpenSearch/v1/docs/setup.md

@@ -0,0 +1,19 @@
+## Instance URL
+
+The base URL of your OpenSearch database.
+
+For example:
+`https://<your-opensearch-host>:9200`
+
+Do *not* include the `/api' path. 
+
+## Authentication
+
+The data source supports basic (username and password) or anonymous authentication.
+
+If using basic authentication, ensure the user only has read permissions.
+
+If using anonymous, ensure the endpoint is secured in some other form.
+
+If you need to whitelist the IP addresses for SquaredUp these can be found on the [Data Security](https://docs.squaredup.com/reference/security/data-security) KB article.
+