Add README and CODEOWNERS (elastic#15)

* Add plugin README and CODEOWNERS

.github/CODEOWNERS

@@ -200,6 +200,11 @@ x-pack/plugins/telemetry_collection_xpack/schema/xpack_plugins.json @elastic/kib
 # Design
 **/*.scss  @elastic/kibana-design
 
+# Enterprise Search
+/x-pack/plugins/enterprise_search/ @elastic/app-search-frontend @elastic/workplace-search-frontend
+/x-pack/test/functional_enterprise_search/ @elastic/app-search-frontend @elastic/workplace-search-frontend
+/x-pack/plugins/enterprise_search/**/*.scss @elastic/ent-search-design
+
 # Elasticsearch UI
 /src/plugins/dev_tools/ @elastic/es-ui
 /src/plugins/console/  @elastic/es-ui

x-pack/plugins/enterprise_search/README.md

@@ -0,0 +1,25 @@
+# Enterprise Search
+
+## Overview
+
+This plugin's goal is to provide a Kibana user interface to the Enterprise Search solution's products (App Search and Workplace Search). In its current MVP state, the plugin provides a basic engines overview from App Search with the goal of gathering user feedback and raising product awareness.
+
+## Development
+
+1. When developing locally, Enterprise Search should be running locally alongside Kibana on `localhost:3002`.
+2. Update `config/kibana.dev.yml` with `enterpriseSearch.host: 'http://localhost:3002'`
+3. For faster QA/development, run Enterprise Search on `elasticsearch-native` auth and log in as the `elastic` superuser on Kibana.
+
+## Testing
+
+### Unit tests
+
+From `kibana-root-folder/x-pack`, run:
+
+```bash
+yarn test:jest plugins/enterprise_search
+```
+
+### E2E tests
+
+See [our functional test runner README](../../test/functional_enterprise_search).